CN108777655B

CN108777655B - Instant communication method and device, equipment and storage medium thereof

Info

Publication number: CN108777655B
Application number: CN201810457729.XA
Authority: CN
Inventors: 叶华鑫
Original assignee: Shenzhen Koudai Network Technology Co ltd
Current assignee: Shenzhen Koudai Network Technology Co ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2021-12-24
Anticipated expiration: 2038-05-14
Also published as: CN108777655A

Abstract

The embodiment of the invention provides an instant messaging method, an instant messaging device, instant messaging equipment and a storage medium, wherein the method comprises the following steps: acquiring first information to be sent; adding first watermark information into the first information to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, or the first watermark information comprises identification information of a group to which the sending end and a receiving end belong; and sending the second information to a receiving end.

Description

Instant communication method and device, equipment and storage medium thereof

Technical Field

The present invention relates to the field of instant messaging technologies, and in particular, to an instant messaging method, an apparatus, a device, and a storage medium.

Background

The popularity of Instant Messaging (IM) tools at present greatly enriches the communication modes of people and brings convenience to the work and life of people. However, due to the characteristic that electronic information is easy to copy and spread, sensitive information exchanged on the instant messaging tool is leaked, and safety accidents are caused. For example, the bidding items communicated with the members of the project group by the project chief on the IM are copied and forwarded to the competitor by the undeveloped person; the comments which are not suitable for external disclosure and are led on the IM group are sent to the network by the screenshot. Events such as these have been increasingly occurring, which have plagued information security.

The reason for information leakage is usually that the user has to copy, forward or capture chat records to the information on IM, and then send the chat records to illegal information subject. Modern IM tools do not provide any information tracking means for the outgoing behavior, and the leaked information cannot be traced back to the divulged person. This results in a situation where it is very convenient to divulge a secret and it is very difficult to follow up the responsibility.

Disclosure of Invention

In view of this, embodiments of the present invention provide an instant messaging method, an apparatus, a device, and a storage medium thereof, which can quickly and accurately track an outgoing message according to watermark information by adding the watermark information to the transmitted message.

The technical scheme of the embodiment of the invention is realized as follows:

the embodiment of the invention provides an instant messaging method, which comprises the following steps:

acquiring first information to be sent;

adding first watermark information into the first information to obtain second information; the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, or the first watermark information comprises identification information of a group to which the sending end and a receiving end belong;

and sending the second information to a receiving end.

a receiving end receives second information containing first watermark information;

if the trigger event is detected, determining other receiving ends for receiving the second information according to the trigger event;

adding second watermark information into the second information to obtain third information; the second watermark information comprises identification information of other receiving ends of the second information, and the second watermark information is hidden in the third information;

and sending the third information to a receiving end of the second information.

The embodiment of the invention provides an instant communication device, which comprises: the device comprises an acquisition module, a first adding module and an output module, wherein:

the acquisition module is used for acquiring first information to be sent;

the first adding module is used for adding first watermark information into the first information to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, or the first watermark information comprises identification information of a group to which the sending end and a receiving end belong;

and the output module is used for sending the second information to a receiving end.

The embodiment of the invention provides an instant communication device, which comprises: receiving module, detection module, second add module and sending module, wherein:

the receiving module is used for receiving second information containing the first watermark information by a receiving end;

the detection module is used for determining other receiving ends for receiving second information according to the trigger event if the trigger event is detected;

the second adding module is used for adding second watermark information into the second information to obtain third information; the second watermark information comprises identification information of other receiving ends of the second information, and the second watermark information is hidden in the third information;

and the sending module is used for sending the third information to a receiving end of the second information.

The embodiment of the invention provides instant messaging equipment, which comprises a memory and a processor, wherein the memory stores a computer program capable of running on the processor, and the processor executes the program to realize the steps in the instant messaging method.

An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the instant messaging method described above.

The embodiment of the invention provides an instant messaging method, an instant messaging device, equipment and a storage medium, wherein first, first information to be sent is obtained; then, adding first watermark information into the first information to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, or the first watermark information comprises identification information of a group to which the sending end and a receiving end belong; finally, the second information is sent to a receiving end; in this way, by adding watermark information to the transmitted information, the outgoing information can be quickly and accurately tracked based on the watermark information.

Drawings

FIG. 1A is a diagram illustrating a network architecture according to an embodiment of the present invention;

FIG. 1B is a diagram illustrating a network architecture according to an embodiment of the present invention;

fig. 1C is a schematic flow chart of adding watermark information according to an embodiment of the present invention;

fig. 1D is a schematic flowchart of extracting watermark information according to an embodiment of the present invention;

fig. 2A is a schematic view of an implementation flow of an instant messaging method according to an embodiment of the present invention;

FIG. 2B is a diagram illustrating an end-to-end individual communication network architecture according to an embodiment of the present invention;

FIG. 2C is a diagram of another network architecture according to another embodiment of the present invention;

fig. 3A is an interaction diagram illustrating an implementation of an instant messaging method according to an embodiment of the present invention;

FIG. 3B is a diagram illustrating an end-to-end single communication network architecture according to another embodiment of the present invention;

FIG. 3C is a diagram of another network architecture according to an embodiment of the present invention;

fig. 4A is another interaction diagram illustrating an implementation of an instant messaging method according to an embodiment of the present invention;

FIG. 4B is a diagram illustrating a group communication network architecture between clients according to an embodiment of the present invention;

FIG. 4C is a diagram of another network architecture according to an embodiment of the present invention;

FIG. 4D is a diagram illustrating another network architecture according to another embodiment of the present invention;

FIG. 5 is a diagram illustrating a scenario of sending a message with watermark information according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a scenario for implementing one-to-one communication according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating one-to-one communication according to an embodiment of the present invention;

FIG. 8 is a flow chart illustrating group communication according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an instant messaging device according to an embodiment of the present invention;

fig. 10 is a diagram illustrating a hardware entity of an instant messaging device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following describes specific technical solutions of the present invention in further detail with reference to the accompanying drawings in the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Fig. 1A is a schematic diagram of a network architecture according to an embodiment of the present invention, as shown in fig. 1A, the network architecture includes a first client 11 and a second client 12, where an instant messaging application is installed in a mobile device of the first client 11 and a mobile device of the second client 12 as clients, the first client 11 and the second client 12 may perform instant messaging with other clients, and in the embodiment of the present invention, the first client 11 and the second client 12 may perform message interaction directly. The instant messaging application is used for carrying out instant messaging with other users.

Fig. 1B is a schematic diagram of another network architecture according to an embodiment of the present invention, as shown in fig. 1B, the network architecture includes a first client 13, a second client 14, and a server 15, wherein the first client 13 and the second client 14 are installed with an instant messaging application, and the first client 13 and the second client 14 can perform instant messaging with other clients. The server 15 is a server corresponding to the instant messaging application. The first client 13 and the second client 14 perform message interaction through the server 15.

When the second client 14 receives the message, the user may send the message out, and if the message is a confidential document, the message may be leaked, but a disclosure person cannot be found according to the message sent in the instant messaging application, which causes a problem that the disclosure person is easy to be leaked through the instant messaging application, but it is difficult to track the disclosure person.

In order to solve the above problems, embodiments of the present invention provide an instant messaging method, in which identification information is added to information to be sent in the form of a digital watermark, so that a divulger can be tracked according to watermark information when information is leaked.

The common watermark is generally visible, is usually formed in the paper making process, is clamped in the paper but not on the surface of the paper, can clearly see figures, portraits or characters with light and dark textures when being seen from the light, and is usually applied to RMB, shopping rolls, grain tickets, securities, documents and the like, such as printed credit reports.

Digital watermarking is a technology of directly embedding some identification information (such as identification information of a receiver and a sender) into a digital carrier (including multimedia, documents, software and the like) or indirectly representing (modifying the structure of a specific area), and does not affect the use value of the original carrier and is not easy to be ascertained and modified again. But can be identified and recognized by the producer. The information hidden in the carrier can achieve the purposes of confirming content creators and purchasers, transmitting secret information, judging whether the carrier is tampered or not and the like. The picture added with the digital watermark does not influence reading, has no change in sense, and does not increase the volume of the picture obviously. The digital watermarking technology adds watermark information into a space domain or a frequency domain of a picture through signal transformation, and as shown in fig. 1C, the digital watermarking technology can be realized through the following steps:

in step S11, an image is acquired.

In step S12, discrete fourier transform is performed on the image to convert the image into a frequency domain.

In step S13, a frequency domain of the fourier-transformed image is obtained.

Step S14, the watermark information is determined according to the identification information of both the transmitter and the receiver.

And step S15, encoding the watermark information.

In step S16, the watermark information after encoding is added to the frequency domain of the image.

And step S17, performing inverse discrete Fourier transform on the frequency domain of the image added with the watermark information to obtain a watermark image.

In step S18, a watermark image is output.

In the related art, watermark information can be extracted from a watermark image by an inverse operation to the operation shown in fig. 1C. As shown in fig. 1D, the method comprises the following steps:

in step S21, a watermark image is acquired.

And step S22, performing discrete Fourier transform on the watermark image to obtain the frequency domain of the watermark image.

In step S23, an original image is acquired.

In step S24, the original image is subjected to discrete fourier transform to the frequency domain of the original image.

In step S25, a frequency domain of the fourier-transformed image is obtained.

Step S26, the frequency domain of the original image is removed from the frequency domain of the watermark image, and a frequency domain corresponding to the watermark information is obtained.

And step S27, decoding the frequency domain corresponding to the watermark information to obtain the watermark information.

In step S28, watermark information is output.

The embodiment of the invention adds the watermark information in the instant messaging information based on the digital watermark technology so as to ensure that once the information is leaked, a divulger can be found according to the watermark information, thereby ensuring the safety of the information.

An embodiment of the present invention provides an instant messaging method, and fig. 2A is a schematic diagram illustrating an implementation flow of the instant messaging method according to the embodiment of the present invention, as shown in fig. 2A, the method includes the following steps:

step S201, a first message to be sent is acquired.

Here, the first information includes at least one of text information and multimedia information, and the multimedia information includes at least one of image information and audio information, such as text, audio or video.

The method provided by this embodiment may be implemented by a device serving as a sending end, where the device may be implemented by a mobile device, for example, a mobile device with wireless communication capability such as a mobile phone (mobile phone), an iPad, a notebook, and the like. The device may also be a computing-capable device that is not mobile, such as a desktop computer, etc. The device can be provided with an instant messaging application, and a user can send various text messages or multimedia messages and the like with other users through the instant messaging application. The "acquiring the first information to be sent" may be that the user inputs the information to be sent from an instant messaging application of the device, for example, inputting a segment of text, a segment of voice, or a segment of video; it may also be information sent by other clients to the instant messenger application of the device through the same instant messenger application. As shown in fig. 2B, the network architecture includes a client 21 and a client 22, where an instant messaging application is installed in a mobile device of the client 21 and a mobile device of the client 22 as the clients, the client 21 and the client 22 can perform instant messaging with other clients, and when the client 21 and the client 22 perform end-to-end messaging through IM, the client 21 obtains first information to be sent to the client 22.

In other embodiments, the method provided by this embodiment may also be implemented by a server. Namely, the server acquires the first information to be sent uploaded from the instant messaging application client. As shown in fig. 2C, the network architecture includes a client 23, a client 24, and a server 25, wherein an instant messaging application is installed as a client in a mobile device of the client 23 and a mobile device of the client 24, and the client 23 and the client 24 can perform instant messaging with other clients. The server 25 is a server corresponding to the instant messaging application. When communicating through the server by means of the client 23 and the client 24: when the client 23 and the client 24 communicate through IM, the client 23 as a sending end uploads information to be sent to a server 25 corresponding to the IM.

Step S202, adding first watermark information in the first information to obtain second information.

Here, the first watermark information is hidden in the second information; the first watermark information includes identification information of a transmitting end, or the first watermark information includes identification information of a group to which the transmitting end and the receiving end belong. The identification information of the sending end refers to information capable of uniquely representing the identity of the sending end, such as a serial number of the sending end; the identification information of the group refers to information that can uniquely represent the identity of the group, such as an account number of the group. The adding of the first watermark information in the first information is that the first watermark information is added in the first information in a digital watermark form, so that the first watermark information is ensured to be imperceptible to a user.

Step S202 may be implemented by a device or a server.

When step S202 is implemented by the device, the device adds the first watermark information to the acquired first information, and may directly send the second information added with the first watermark information to the receiving end, that is, perform end-to-end communication; the second information can also be uploaded to a server, and then the server sends the second information to the receiving end. As shown in fig. 2B, the client 21 adds first watermark information including identification information of the client 21 and the client 22 in the form of a digital watermark to the information.

When the step S202 is implemented by a server, the server adds first watermark information to the acquired first information uploaded by the device in the form of a digital watermark, to obtain second information; as shown in fig. 2C, the server 25 obtains the identification information of the client 23 as the sending end and the identification information of the receiving end 24, and adds the identification information of the two as the first watermark information to the information to be sent in the form of digital watermark, so as to obtain the second information.

Here, the second information is the same as the content presented by the first information, that is, the second information and the first information are not different from each other from the perspective of the user, and the user cannot perceive the watermark information therein, for example, the first information is a text, and although the watermark information is added to the second information, the first information and the second information that the user sees are both only a text that is the same.

Step S203, sending the second information to a receiving end.

Here, step S203 may be implemented by a device, or may be implemented by a server.

When the step S203 is implemented by a device, as shown in fig. 2B, the device serving as the sending end sends the information to be sent after adding the watermark information to the client 22 serving as the receiving end.

When the step S203 is implemented by a server, as shown in fig. 2C, the server 25 sends the information to be sent after adding the first watermark information to the client 24 serving as the receiving end.

In the instant messaging method provided by the embodiment of the invention, first information to be sent is obtained; then, adding first watermark information into the first information to obtain second information; the first watermark information at least comprises identification information of a sending end or identification information of a group to which the sending end and a receiving end belong, and the first watermark information is hidden in the second information; finally, the second information is sent to a receiving end; therefore, when the instant messaging application is used for communication, the outgoing message person can be quickly and accurately found according to the first watermark information by adding the digital first watermark information into the message to be sent.

In other embodiments, when the first watermark information includes identification information of a transmitting end, the first watermark information further includes identification information of a receiving end; for example, the sending end is a, the receiving end is B, and the first watermark information includes identification information of a and identification information of B; therefore, the identification information of the sending end and the identification information of the receiving end are contained in the first watermark information in the information to be sent, and the tracking of the flow direction of the information to be sent is facilitated.

In other embodiments, when the first information is sent by other clients, the method comprises the steps of:

step S221, the sending end or the server uses the received information sent by the other client as the first information to be sent.

Here, the other clients are clients of the same instant messaging application installed in other devices, and the information sent by the other clients and received by the sending end or the server is equivalent to the information forwarded by the other clients.

Step S222, determining a receiving end of the first information, and determining first watermark information according to the identification information of the sending end, the identifications of the other clients, and the identification information of the receiving end.

Step S223, adding the first watermark information to the first information in the form of a digital watermark to obtain second information.

In this embodiment, when the received information is information forwarded by other clients, the identification information of the other clients is also included in the first watermark information in the first information, which facilitates tracking of the flow direction of the first information.

An embodiment of the present invention provides an instant messaging method, and fig. 3A is an interaction schematic diagram of an implementation of the instant messaging method according to the embodiment of the present invention, as shown in fig. 3A, when a sending end and a receiving end perform one-to-one individual communication, the method includes the following steps:

in step S301, the transmitting end receives input first information to be transmitted.

Here, the sending end may be implemented by a mobile device capable of installing an instant messaging application, for example, a mobile phone, a learning machine, a tablet computer, and the like capable of installing an instant messaging application, as shown in fig. 3B, a client 31 serving as the sending end acquires first information input by a user or first information sent by other clients.

Step S302, the sending end determines the receiving end of the first information, and determines the first watermark information according to the identification information of the sending end and the identification information of the receiving end.

Here, the sending end determines the receiving end of the first information, which may be understood as that the sending end or the server determines the receiving end that receives the first information and obtains the identification information of the receiving end, as shown in fig. 3B, the client 31 determines the first watermark information according to the identification information of the client 31 and the identification information of the client 32.

Step S303, the sending end adds the first watermark information to the first information in the form of digital watermark to obtain second information.

Here, as shown in fig. 3B, the client terminal 31 adds the first watermark information to the first information in the form of a digital watermark, resulting in the second information.

Step S304, the sending end sends the second information to the receiving end.

Here, as shown in fig. 3B, the client terminal 31 transmits the second information to the client terminal 32 as a receiving terminal.

In step S305, the receiving end receives second information including the first watermark information.

Here, as shown in fig. 3B, the client 32 receives the second information containing the first watermark information.

The receiving end may be a mobile device capable of installing an instant messaging application. It is realized from step S301 to step S305 that the transmitting end will add the first information to which the watermark information is added,

step S306, if the trigger event is detected, the receiving end determines other receiving ends for receiving the second information according to the trigger event.

Here, as shown in fig. 3B, if the client 32 detects a trigger event (operation such as forwarding the second information, copying the second information, or screenshot the second information), the client 32 determines another receiving end of the second information, that is, the client 33, according to the trigger event.

The other receiving end of the second message may be a mobile device capable of installing an instant messaging application. The other receiving end and the receiving end of the second information are different mobile devices, for example, the receiving end is a mobile phone with a chat application client, and the other receiving end of the second information may be a computer or a mobile phone with the same chat application client. And the triggering event comprises copying the second information, forwarding the second information and carrying out screenshot on a page where the third information is located. If the trigger event is detected, the receiving end determines other receiving ends of the second information according to the trigger event, which can be understood as determining other receiving ends of the second information when the receiving end detects that the user performs operations such as copying, forwarding or screenshot on the received second information (i.e. when the receiving end wants to send the second information out).

Step S307, the receiving end adds second watermark information to the second information to obtain third information.

Here, as shown in fig. 3B, the client 32 adds second watermark information to the second information to obtain third information. The second watermark information comprises identification information of other receiving ends of the second information, and the second watermark information is hidden in the third information; the receiving end adds the second watermark information in the second information to obtain the third information, and can also be realized by the server, namely the receiving end uploads the second information to be forwarded to the server of the instant messaging application, the server obtains the identification information of other receiving ends receiving the second information, determines the second watermark information according to the identification information of other receiving ends of the second information, and adds the second watermark information to the second information in the form of digital watermark to obtain the third information.

Step S308, the receiving end sends the third information to other receiving ends of the second information.

Here, as shown in fig. 3B, the client 32 transmits the third information to the client 33. The third information carries first watermark information and second watermark information, namely the watermark information of the third information comprises identification information of a sending end, identification information of a receiving end and identification information of a receiving end of the second information; for example, a first user is a company high-level leader and sends first information (assumed to be a company secret) to be sent to a second user which is the company high-level leader, and the first information is added with first watermark information including identification information of the first user and the second user; when a second user sends first information (namely second information) including first watermark information to a third user in a copying, screenshot or forwarding mode, the client side of the instant messaging application corresponding to the second user or a server of the client side adds the second watermark information (the second watermark information includes identification information of the third user) to the second information to obtain third information, and the third information is sent to the third user.

In other implementations, after the step S301, that is, after the transmitting end or the server obtains the input first information to be transmitted, the method further includes the following steps:

step S311, if the first information is text information, the sending end or the server converts the text information into a picture.

Here, the picture and the text information present the same text content;

step S312, the sending end or the server adds the first watermark information to the picture to obtain the second information.

Here, the sending end or the server adds first watermark information in the spatial domain of the picture or the frequency domain of the picture in the form of digital watermark to obtain the second information.

The method implemented in the steps S301 to S304 may also be implemented by a server of an instant messaging application, that is, the server obtains first information to be sent uploaded by a sending end; then adding first watermark information to the first information to obtain second information; finally, the second information is sent to the receiving end, and when the communication is performed through the client 23 and the client 24 through the server, two modes are included:

the first method is as follows: as shown in fig. 2C, when the client 23 and the client 24 communicate through IM, the client 23 serving as a sending end uploads information to be sent to a server 25 corresponding to the IM, the server 25 obtains identification information of the client 23 serving as the sending end and identification information of the receiving end 24 serving as the receiving end, the server 25 adds the identification information of the client 23 serving as the sending end and the identification information of the receiving end 24 serving as first watermark information to be sent in a form of digital watermark, and then the server 25 sends the information to be sent with the added watermark information to the client 24.

The second method comprises the following steps: as shown in fig. 3C, when the client 34 and the client 35 communicate through IM, the client 34 acquires information to be sent to the client 35; then, the client 34 adds first watermark information including identification information of the client 34 and the client 35 in the information in a digital watermark form, uploads the information to be sent after the first watermark information is added to the server 36, and finally the server 36 sends the information to be sent after the first watermark information is added to the client 35 serving as a receiving end; therefore, the first watermark information is added into the information received by the client side serving as the receiving end, once the information is leaked, the information leakage person can be quickly found according to the watermark information, and the information safety is guaranteed.

An embodiment of the present invention provides an instant messaging method, and fig. 4A is another interaction schematic diagram illustrating an implementation of an instant messaging method according to an embodiment of the present invention, as shown in fig. 4A, when a sending end and a receiving end perform group communication, the method includes the following steps:

in step S401, the sending end receives input first information to be sent.

Here, the transmitting end of the first information and the receiving end of the first information belong to the same group; the group includes at least three group members, as shown in fig. 4B, the

clients

41, 42, and 43 belong to a group 44 of an instant messaging application, and perform group communication in the group, and the client 41 serves as a sending end to receive input first information to be sent.

In step S402, the transmitting end determines a group member as a receiving end that receives the first information.

Here, as shown in fig. 4B, the client 41 determines the group members (i.e., the client 42 and the client 43) as the receiving ends that receive the first information. The sending end determines that the group member serving as the receiving end receives the first information, and it can be understood that if there are three project group members of a certain company, the three project group members are respectively member a, member B and member C, a group with only three members is established in the same instant messaging application, member a is a project manager, member a wants to notify member B and member C of a bidding low price of a project, and first, a client of the instant messaging application of member a or a server of the instant messaging application determines an object (i.e., member B and member C) to which the notification is to be sent.

In step S403, the sending end determines the first watermark information according to the identification information of the group member as the receiving end, the identification information of the group, and the identification information of the group member as the sending end.

Here, as shown in fig. 4B, the client 41 determines the first watermark information based on the identification information of the

client

42 or 43 as the receiving end, the identification information of the group 44, and the identification information of the client 41 as the transmitting end. The identification information of the group member at the receiving end is identification information of the member a (for example, a serial number corresponding to the member a), identification information of the group (for example, Identity (ID)) and identification information of the group member as the transmitting end, that is, identification information of the member B and identification information of the member C; in this embodiment, when the member a sends information to the group where the member a is located, the member a needs to send the information to each group member, and the watermark information of the information received by each group member is different, for example, when the member a sends information to the group member B, the watermark information is determined according to the identification information of the member a, the identification information of the member B, and the identification information of the group (that is, the watermark information includes the identification information of the member a, the identification information of the member B, and the identification information of the group);

when the member a sends information to the group member C, the first watermark information is determined according to the identification information of the member a, the identification information of the member C and the identification information of the group (that is, the first watermark information includes the identification information of the member a, the identification information of the member C and the identification information of the group).

Step S404, the sending end adds the first watermark information to the first information to obtain second information.

Here, as shown in fig. 4B, the client 41 adds the first watermark information to the first information, resulting in second information. The second watermark information includes identification information of a receiving end of the second information, and the second watermark information is hidden in the third information. In this embodiment, when the member a sends information to the group member B, watermark information including the identification information of the member a, the identification information of the member B, and the identification information of the group is added to the information to be sent, so as to obtain second information.

Step S405, sending the second information to the group member corresponding to the first watermark information.

Here, as shown in fig. 4B, the client 41 transmits second information, in which the first watermark information includes identification information of the client 41, the client 42, and the group 44 (i.e., the client 41, 42 and the group watermark information in fig. 4B), to the client 42; the client 41 transmits second information including identification information of the client 41, the client 43, and the group 44 (i.e., the client 41 and 43 watermark information in fig. 4B) to the client 43. Although the watermark information included in the information received by the group members (client 42 and client 43) on the receiving side is different, the watermark information is added in the form of a digital watermark, and the information that can be perceived by both the client 42 and client 43 is completely the same from the viewpoint of the user.

In step S406, the receiving end receives second information including the first watermark information.

Here, as shown in fig. 4B, the client 42 and the client 43 receive the corresponding second information, respectively.

Step S407, if the trigger event is detected, the receiving end determines other receiving ends for receiving the second information according to the trigger event.

Here, as shown in fig. 4B, if the client 42 performs operations such as forwarding, copying, or screenshot on the second information, the client 42 determines another receiving end of the second information, that is, the client 45. The triggering event includes at least one of: copying the second information, forwarding the second information or carrying out screenshot on a page where the second information is located.

Step S408, the receiving end adds second watermark information to the second information to obtain third information.

Here, as shown in fig. 4B, the client 42 adds second watermark information (including identification information of the client 45) to the second information, resulting in third information. The second watermark information comprises identification information of a receiving end of the second information, and the second watermark information is hidden in the third information; in this embodiment, if the client 42 intends to forward the second information from the receiving end to other receiving ends (assuming that the client 45 is the client), the client of the instant messaging application of the client 42 or the server of the application adds the second watermark information corresponding to the identification information of the client 45 to the second information, so as to obtain the third information, that is, the second watermark information in the third information includes the identification information of the client 41, the identification information of the client 42, the identification information of the client 43, the identification information of the group 44, and the identification information of the client 45.

In other embodiments, if the first watermark information does not include identification information of the receiving end, the second watermark information further includes identification information of the receiving end. That is, if the client 43 determines that the second information does not include its own identification information (i.e., the identification information of the client 43) after receiving the second information, the own identification information is automatically added to the second information in the form of a digital watermark.

Step S409, sending the third information to other receiving ends of the second information.

Here, as shown in fig. 4B, the client 42 transmits the third information to the client 45.

In the embodiment of the invention, when a plurality of users carry out group communication through the instant messaging tool, as the watermark information contained in the information received by each group member is different, once the information is leaked, the information leakage person can be easily traced, and the information safety is ensured.

The method implemented in steps S401 to S405 may also be implemented by a server of an instant messaging application, that is, the server obtains first information to be sent uploaded by a sending end; then adding watermark information to the first information to obtain second information; and finally, sending the second information to the group members corresponding to the watermark information, wherein the group communication through a plurality of clients comprises two modes:

the first method is as follows: as shown in fig. 4C, when the client 46, the client 47 and the client 48 perform group communication through the server 49 of IM, the client 46 as the sender uploads the information to be sent to the server 49 corresponding to the IM, and the server prepares to send the first information to the

clients

47 and 48, respectively, where the process of sending the first information to the client 47 by the server 49 includes: the server 49 adds the first watermark information (i.e. the watermark information of the clients 46, 47 and the group in fig. 4C) to the first information to be sent in the form of digital watermark, to obtain the second information, wherein the first watermark information includes the identification information of the client 46 as the sending end and the identification information of the client 47 and the group as the receiving end. The server sends this second information to the client 47.

The process of the server 49 sending the first information to the client 48 includes: the server 49 adds the first watermark information (i.e. the watermark information of the clients 46, 48 and the group in fig. 4C) to the first information to be sent in the form of digital watermark, to obtain the second information, wherein the first watermark information includes the identification information of the client 46 as the sending end and the identification information of the client 48 and the identification information of the group as the receiving end. The server 49 sends the second information to the client 48.

The second method comprises the following steps: as shown in fig. 4D, when the

clients

50, 51, and 52 perform group communication through the server 53 of IM, the client 50 acquires first information to be sent, and prepares to send the first information to the

clients

51 and 52, respectively, where the process of sending the first information to the client 51 by the client 50 includes: the client 50 adds first watermark information to the first information to obtain second information, wherein the first watermark information includes identification information of the client 50, identification information of the client 51 and group identification information. The client 50 uploads the second information added with the first watermark information to the server 53, and the server 53 sends the second information to the client 51. The process of the client 50 sending the first information to the client 52 includes: the client 50 adds first watermark information to the first information to obtain second information, wherein the first watermark information includes identification information of the client 50, identification information of the client 52, and group identification information. The client 50 uploads the second information added with the first watermark information to the server 53, and the server 53 sends the second information to the client 52. As can be seen from the above, the watermark information is added to the second information received by the receiving end (the client ends 51 and 52), and once the information is leaked, the information-leaking person can be quickly found according to the watermark information, thereby ensuring the security of the information.

The embodiment of the invention provides an instant messaging method, which is characterized in that information added with a digital watermark is sent to a receiving end, so that watermark information can be added to main information, the reading experience of the main information is not influenced, and a divulger can be found out according to the watermark information when the information is leaked. In the related art, the digital watermarking technology generally adds watermark information in a space domain or a frequency domain of a picture, and the digital watermarking has better robustness and can resist various operations such as screenshot, picture stretching, picture rotation and the like. As shown in fig. 5, the user of the instant messenger application installed on the device 501 is a market director, and the user of the instant messenger application installed on the device 502 is zhang company employee; first, the instant messaging application client of the device 502 or the server of the application converts the internal message 503 to be sent, which is "bid this time, the base price of us is 3 ten thousand yuan", from a text format to a picture format, adds first watermark information containing identification information of the market director and identification information of zhang, in the internal message of the picture format, and then sends the internal message added with the first watermark information to zhang. If Zhang III wants to forward, copy or screen-capture the internal message to a third party, the message received by the third party still carries first watermark information containing identification information of market chief executive and identification information of Zhang III; therefore, the information in the instant messaging application with the digital watermark is marked, and once a divulger sends the information out, the divulger can trace back to the divulger by extracting the watermark information. Therefore, the divulgence source can be traced, the security hole can be plugged in time, and the divulgence can be punished.

In the embodiment of the invention, for the message in the text format sent in the IM, the message in the text format is converted into the message in the picture format at the server side of the IM, and the content on the picture is the characters. And simultaneously calling a digital watermark adding tool to add watermark information to the picture. And then sends the picture added with the watermark information to a receiving end. Thus, the sending end sends the text message, and the receiving end receives the text picture carrying the digital watermark without influencing reading. Because the image carries the digital watermark, the receiving end can carry the digital watermark by transmitting, copying, screenshot and other operations. If the information is leaked, the divulger can be traced by extracting the watermark from the outgoing information. In order to facilitate the tracing of the message source, the watermark information added to the message carries the identification information of the sending end and the identification information of the receiving end. As shown in fig. 6, user a and user B communicate through instant messenger application, and first, user a uploads text message 60 to server 61 of the instant messenger application; then, the server 61 converts the message in the text format into the picture format and adds first watermark information (the first watermark information includes the identification information of the user a and the identification information of the user B) to the message in the picture format to obtain a picture including the first watermark information; finally, the server 61 sends the picture 62 containing the first watermark information to the user B.

When users A, B and C belong to a group G of an instant messaging application, if a user a is a sending end, first watermark information is added to information sent by the group G received by a user B, wherein the first watermark information includes identification information of the user a, identification information of the user B and identification information of the group G; and the third watermark information is added in the information received by the user C and sent by the group G, wherein the third watermark information comprises the identification information of the user A, the identification information of the user C and the identification information of the group G. Therefore, if the information transmitted in the group is leaked, the source of the leakage message is known from the watermark information, and the investigation can be started from the fact that the receiving end user is determined to be a divulger.

Fig. 7 is a schematic flow chart of implementing one-to-one communication according to an embodiment of the present invention, and as shown in fig. 7, the method includes the following steps:

step S701, the server receives first information to be sent uploaded by the instant messaging application.

Here, the first information may be first information input by a user on a device, and the instant messaging application as a client receives the first information input by the user and then uploads the first information to the server by the client; or sent to the client by other clients and then uploaded to the server by the client.

Step S702, the server judges whether the first information is in a text format or not, and obtains a judgment result.

Here, if the judgment result indicates that the first information is a text-formatted character, the process proceeds to step S703, and if not, the process proceeds to step S704.

Step S703, the server converts the text information into a picture.

Here, the picture presents the same textual content as the text information.

Step S704, the server determines the first watermark information according to the identification information of the sending end and the identification information of the receiving end.

Step S705, the server adds the first watermark information to the first information to obtain the second information.

Here, the first watermark information includes identification information of a receiving end and identification information of a transmitting end. If the first information is in a picture format converted from a text format, that is, the first watermark information is added to the picture, if the first information is not in a picture format converted from a text format (for example, the first information is multimedia information such as audio and video), the first watermark information is directly added to the first information.

Step S706, the server sends the second information to the receiving end.

Here, if the sending end is a user a, the receiving end is a user B, the user a communicates with the user B through the instant messaging application, the user a inputs a segment of text in the instant messaging application, and the user B receives a picture containing the segment of text and watermark information (the watermark information includes identification information of the user a and identification information of the user B), but the user B can only see the segment of text.

In step S707, the receiving end receives the second information.

Fig. 8 is a schematic flow chart of implementing group communication according to an embodiment of the present invention, and as shown in fig. 8, the method includes the following steps:

step S801, the server, as a group member of the sending end, uploads the first information to be sent through the instant messaging application.

Here, the group includes at least three group members, and it is assumed that the group G described in this embodiment includes three group members (member a, member B, and member C, where member a serves as a transmitting end, and member B and member C serve as a receiving end).

Step S802, the server judges whether the first information is in a text format, and obtains a judgment result.

Here, if the judgment result indicates that the first information is a character in a text format, the process proceeds to step S803, and if not, the process proceeds to step S804.

In step S803, the server converts the text information into a picture.

Step S804, the server determines the first watermark information according to the identification information corresponding to the group member of the sending end, the identification information corresponding to the group member as the receiving end, and the identification information of the group.

Here, the identification information corresponding to the group member (i.e., member a) of the sending end may be a serial number of the instant messaging application client corresponding to member a or an identity number of member a itself, and the identification information corresponding to the group member as the receiving end may be a serial number of the instant messaging application client corresponding to member B or C or an identity number of member B or C itself. The sending end and the receiving end belong to the same group, and the identification information of the sending end, the identification information of the receiving end and the identification information of the group can be understood as the identification information of the group member as the sending end, the identification information of the group member as the receiving end and the identification information of the group; therefore, the watermark information contained in the information received by different group members is different, for example, in the group G, when the member a sends a message to the member B, the server takes the identification information of a, the identification information of B and the identification information of the group G as first watermark information (abb watermark information for short); when the member a sends a message to the member C, the server takes the identification information of a, the identification information of C, and the identification information of the group G as first watermark information (ACG watermark information for short).

Step S805, the server adds the first watermark information to the first information to obtain the second information.

Here, in the group G, when the member a sends a message to the member B, the server adds the ABG watermark information to the first information to obtain second information; and when the member A sends the message to the member C, the server adds the ACG watermark information to the first information to obtain second information.

Step S806, the server sends the second information to the group member corresponding to the first watermark information.

Here, inside the group G, when the member a sends a message to the member B, the server sends the second information added with the ABG watermark information to the member B; when the member A sends the message to the member C, the server sends the second information added with the ACG watermark information to the member C.

In step S806, the group members receive the second information.

In this embodiment, when a user performs one-to-one communication or group communication through instant messaging application communication, watermark information including identifiers of both parties and a group identifier is added to a communication message, and once any party reveals a message to others, the message can be traced according to the watermark information, so that the defect that the instant messaging application cannot guarantee information security or cannot find a divulger once the message reveals is overcome.

Fig. 9 is a schematic view of a composition structure of an instant messaging device according to an embodiment of the present invention, and as shown in fig. 9, the instant messaging device 900 includes: a receiving module 901, a first adding module 902 and an outputting module 903, wherein:

a receiving module 901, configured to obtain first information to be sent;

a first adding module 902, configured to add first watermark information to the first information to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, or the first watermark information comprises identification information of a group to which the sending end and a receiving end belong;

and the output module 903 is configured to send the second information to a receiving end.

In other embodiments, the apparatus further comprises:

and the third adding module is used for adding the first watermark information in the first information in a digital watermark form to obtain second information. When the first watermark information comprises identification information of a sending end, the first watermark information also comprises identification information of a receiving end;

the first information comprises at least one of text information and multimedia information, and the multimedia information comprises at least one of image information and audio information.

In other embodiments, the apparatus further comprises:

the conversion module is used for converting the text information into a picture if the first information is the text information; wherein the picture and the text information present the same text content;

and the fourth adding module is used for adding the first watermark information in the picture to obtain the second information.

In other embodiments, the apparatus further comprises:

and the fifth adding module is used for adding the first watermark information in the space domain of the picture or the frequency domain of the picture in a digital watermark mode to obtain the second information.

In other embodiments, the apparatus further comprises:

the first sending module is used for receiving input first information to be sent;

the second determining module is used for determining a receiving end of the first information and determining first watermark information according to the identification information of the sending end and the identification information of the receiving end;

and the sixth adding module is used for adding the first watermark information to the first information in a digital watermark form to obtain second information.

In other embodiments, the apparatus further comprises:

the first acquisition module is used for receiving input first information to be sent;

the first receiving module is used for determining group members which are used as receiving ends and receive the first information;

a third determining module, configured to determine first watermark information according to identification information of a group member serving as a receiving end, the identification information of the group, and identification information of a group member serving as a sending end;

a seventh adding module, configured to add the first watermark information to the first information to obtain second information;

and the first output module is used for sending the second information to the group member corresponding to the first watermark information.

An embodiment of the present invention further provides an instant messaging device, where the device includes: receiving module, detection module, second add module and sending module, wherein:

the detection module is used for determining other receiving ends for receiving the second information according to the trigger event if the trigger event is detected; the triggering event comprises copying the second information, forwarding the second information and carrying out screenshot on a page where the second information is located;

In other embodiments, if the first watermark information does not include identification information of the receiving end, the second watermark information further includes identification information of the receiving end.

It should be noted that the above description of the embodiment of the apparatus, similar to the above description of the embodiment of the method, has similar beneficial effects as the embodiment of the method. For technical details not disclosed in the embodiments of the apparatus according to the invention, reference is made to the description of the embodiments of the method according to the invention for understanding.

It should be noted that, in the embodiment of the present invention, if the instant messaging method is implemented in the form of a software functional module and is sold or used as an independent product, the instant messaging method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling an instant messaging device (which may be a device, a server, or the like) to perform all or part of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Accordingly, an embodiment of the present invention further provides a readable storage medium, where an instant messaging program is stored on the readable storage medium, and the instant messaging program, when executed by a processor, implements the steps of the instant messaging method described above.

An embodiment of the present invention further provides an instant messaging device (including a device or a server), including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the steps in the instant messaging method when executing the program.

The above description of the instant messaging device and storage medium embodiments is similar to the description of the method embodiments above, with similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the instant messaging device and the storage medium of the present invention, reference is made to the description of the embodiments of the method of the present invention for understanding.

It should be noted that fig. 10 is a schematic diagram of a hardware entity of the instant messaging device in the embodiment of the present invention, as shown in fig. 10, the hardware entity of the device 1000 includes: a processor 1001, a communication interface 1002, and a memory 1003, among others

The processor 1001 generally controls the overall operation of the device 1000.

The communication interface 1002 may enable the device to communicate with other devices or servers over a network.

The Memory 1003 is configured to store instructions and applications executable by the processor 1001, and may also buffer data (e.g., image data, audio data, voice communication data, and video communication data) to be processed or already processed by the processor 1001 and modules in the device 1000, and may be implemented by a FLASH Memory (FLASH) or a Random Access Memory (RAM).

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An instant messaging method, the method comprising:

the sending end or the server takes the received information sent by other clients as first information to be sent;

if the first information is text information, converting the text information into a picture; wherein the picture and the text information present the same text content;

determining a receiving end of the first information, and determining first watermark information according to the identification information of the transmitting end, the identification information of the other clients and the identification information of the receiving end; adding the first watermark information to the first information in a digital watermark form to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, and also comprises identification information of a receiving end and identification information of other clients; or, the first watermark information includes identification information of the sending end, identification information of the receiving end, and identification information of a group to which the sending end and the receiving end belong;

and sending the second information to a receiving end.

2. The method of claim 1, wherein the first information comprises at least one of text information and multimedia information, and wherein the multimedia information comprises at least one of image information and audio information.

3. The method of claim 1, further comprising:

and adding first watermark information in the picture to obtain the second information.

4. The method of claim 3, wherein adding the first watermark information to the picture to obtain the second information comprises:

and adding first watermark information in the spatial domain of the picture or the frequency domain of the picture in a digital watermark mode to obtain the second information.

5. The method according to any one of claims 1 to 4, further comprising: the sending end receives input first information to be sent, or the server receives the first information sent by the sending end;

the sending end or the server determines a receiving end of the first information, and determines first watermark information according to the identification information of the sending end and the identification information of the receiving end;

and the sending end or the server adds the first watermark information to the first information in a digital watermark form to obtain second information.

6. The method according to any one of claims 1 to 4, further comprising: the sending end receives input first information to be sent, or the server receives the first information sent by the sending end;

the sending end or the server determines to receive the first information as a group member of the receiving end;

determining the first watermark information according to the identification information of the group members as the receiving end, the identification information of the group and the identification information of the group members as the sending end;

adding the first watermark information to the first information to obtain the second information;

and sending the second information to the group member corresponding to the first watermark information.

7. An instant messaging method, the method comprising:

a receiving end receives second information containing first watermark information; the first watermark information comprises identification information of a sending end, and also comprises identification information of a receiving end and identification information of other clients; or, the first watermark information includes identification information of the sending end, identification information of the receiving end, and identification information of a group to which the sending end and the receiving end belong;

and sending the third information to other receiving ends of the second information.

8. The method according to claim 7, wherein the second watermark information further includes receiver-side identification information if the first watermark information does not include receiver-side identification information.

9. The method of claim 7, wherein the triggering event comprises one of:

copying the second information, forwarding the second information, and performing screenshot on a page where the second information is located.

10. An instant messaging device, the device comprising: the device comprises an acquisition module, a conversion module, a first adding module and an output module, wherein:

the acquiring module is used for acquiring information sent by other clients and received by a sending end or a server as first information to be sent;

the first adding module is used for determining a receiving end of the first information and determining first watermark information according to the identification information of the sending end, the identification information of the other clients and the identification information of the receiving end; adding the first watermark information to the first information in a digital watermark form to obtain second information; wherein the first watermark information is hidden in the second information; the first watermark information comprises identification information of a sending end, and also comprises identification information of a receiving end and identification information of other clients; or, the first watermark information includes identification information of the sending end, identification information of the receiving end, and identification information of a group to which the sending end and the receiving end belong;

11. An instant messaging device, the device comprising: receiving module, detection module, second add module and sending module, wherein:

the receiving module is used for receiving second information containing the first watermark information by a receiving end; the first watermark information comprises identification information of a sending end, and also comprises identification information of a receiving end and identifications of other clients; or, the first watermark information includes identification information of the sending end, identification information of the receiving end, and identification information of a group to which the sending end and the receiving end belong;

the detection module is used for determining a receiving end of the second information according to the trigger event if the trigger event is detected;

the second adding module is used for adding second watermark information into the second information to obtain third information; the second watermark information comprises identification information of a receiving end of second information, and the second watermark information is hidden in the third information;

12. An instant messaging device comprising a memory and a processor, the memory storing a computer program operable on the processor, wherein the processor when executing the program implements the steps of the instant messaging method of any one of claims 1 to 6 or 7 to 9.

13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the instant messaging method according to any one of claims 1 to 6, or carries out the steps of the instant messaging method according to any one of claims 7 to 9.