TWI577145B - Method for encrypted data transmission of near field communication device and system thereof - Google Patents

Description

Encrypted transmission method and system for near field communication equipment data

The invention relates to the field of message security, and in particular to a data encryption transmission method based on a near field communication device and a system thereof.

With the development of Internet technology, the security of information and information is becoming more and more important. Data authentication devices, such as the hardware digital certificate carrier USB KEY, have personal identity authentication and data encryption and decryption functions, and have been widely used in various businesses in the fields of online banking and e-government.

In the prior art, the data authentication device is mainly connected to the personal computer terminal through the USB interface to complete the data authentication process. However, with the development of the mobile Internet, mobile terminal devices (such as mobile phones, especially smart phones) have gradually been applied to personal office, online banking and other fields, and most of the mobile terminal devices are not supported by The USB interface communicates with the data authentication device. Therefore, for mobile terminals, the security of data messages is an urgent problem to be solved.

NFC (Near Field Communication) technology It is evolved from RFID (Radio Frequency Identification) technology, and can be applied to mobile terminal devices, and gradually gains more and more attention and more and more in mobile terminals (such as smart phones). A wide range of applications.

Near field communication mobile phone is a near field communication module added to the mobile phone to realize short-range wireless communication. This technology has the characteristics of short-range wireless communication, so it can design many mobile phone applications, such as identity authentication, audio and video transmission, and message. Browse, mobile payment, etc. One of the characteristics of near field communication technology is that near field communication equipment can only transmit all the data in the near field communication module at a time when transmitting data. Therefore, current near field communication transmitting devices (such as near field communication mobile phones) can only transmit all the data in the near field communication module at one time when transmitting data, thereby causing all the devices to be contacted by the near field communication transmitting device. The data and messages received by the near field communication receiving device are the same, that is, all the data and messages received by the near field communication receiving device contacted by the near field communication transmitting device are sent out by the near field communication transmitting device. The information is consistent. These consistent materials are either unencrypted or cryptographically processed by the same encryption method.

At present, there is a shortcoming of the near field communication device. For the near field communication device user, when the user transmits data to different near field communication receiving devices that are in contact with each other, the data information of different contents cannot be independently selected and transmitted. All the data and messages transmitted in the near field communication module cannot transmit the data information of different contents for different near field communication receiving devices, and it is not convenient to retain and protect certain data messages to be kept secret by some near field communication receiving devices. It is difficult to secure the protection of data messages.

In view of this, the present invention provides a method and system for encrypting transmission of near field communication equipment data, so as to ensure that a near field communication transmission device provides reception to a plurality of near field communication devices. The security of the data message to be sent, to protect the specific data message to be kept secret by the near field communication receiving device.

The technical solution of the present invention is implemented as follows: a method for encrypting transmission of near field communication device data, comprising the steps of: dividing a near field communication data message into a plurality of sub-data; respectively, using different encryption keys for the sub-data The data is encrypted; the encryption keys are respectively sent to a plurality of near field communication receiving devices corresponding to the plurality of sub-data; the near field communication data is sent to the near field communication receiving device; and the near field communication receiving device is received by the near field communication receiving device The encryption key decrypts the sub-data corresponding to the encryption key to obtain the sub-data information required by the near-field communication receiving device.

Further, the step of transmitting the encryption keys to the near field communication receiving devices corresponding to the sub-data separately includes the following steps: separately sending the encryption keys to the SMS or the e-mail These near field communication receiving devices.

Further, the step of transmitting the near field communication data to the near field communication receiving device further includes the following steps: respectively notifying the location of the sub-data to the corresponding near field communication receiving devices.

Further, the near field communication receiving device is a mobile phone having a near field communication module, a wristband having a near field communication module, an access control device having a near field communication module, or a payment device having a near field communication module.

An encrypted transmission system for near field communication equipment data, comprising a near field communication transmitting device and a plurality of near field communication receiving devices, wherein the near field communication transmitting device comprises: a management module for transmitting near field communication data in the near field communication transmitting device Dividing into a plurality of sub-data, and encrypting the sub-data by using different encryption keys respectively; the communication module is configured to separately send the encryption keys to a plurality of near-field communication receiving devices corresponding to the sub-data And a near field communication module for storing the encrypted near field communication data, and transmitting the stored near field communication data to the near field communication receiving device when communicating with the near field communication receiving devices; The near field communication receiving device receives and stores the encryption keys sent by the communication module, and when receiving the communication connection with the near field communication transmitting device, after receiving the near field communication data sent by the near field communication module, borrowing The sub-data corresponding to itself is decrypted by the received encryption key to obtain the sub-data information required by the near field communication receiving device.

Further, the near field communication module further includes a message processing sub-module, and the communication is connected to the near field communication receiving device, and is configured to notify the corresponding near field communication receiving devices of the positions of the sub-data corresponding to the near field communication receiving devices.

Further, the near field communication transmitting device has a mobile phone with a near field communication module, a wristband with a near field communication module, an access device with a near field communication module, or a payment device with a near field communication module.

Further, the near field communication receiving device has a near field communication function mobile phone, a wristband with near field communication function, an access control device with near field communication function, and a payment device with near field communication function.

As can be seen from the above scheme, the near field communication equipment information provided by the present invention The system divides the near field communication data in the near field communication device into a plurality of sub-data, and encrypts the plurality of sub-data by using different encryption keys respectively, and encrypts the plurality of sub-data separately for different roles or functions of the sub-data. The key informs different near field communication receiving devices, and when the near field communication message interaction is performed in different application environments, the near field communication receiving device can only use the encryption key it knows to decrypt the corresponding sub data, and the other sub data. Unable to decrypt because there is no corresponding encryption key. The encrypted transmission method and system of the near field communication device data of the invention realizes the data in the near field communication transmitting device when performing near field communication communication between a near field communication transmitting device and a plurality of near field communication receiving devices The security of the message protects the specific data messages that are to be kept secret by the near field communication receiving device.

S1~S5‧‧‧Steps

10‧‧‧ Near Field Communication Transmitting Equipment

11‧‧‧Management module

12‧‧‧ Near Field Communication Module

121‧‧‧Message Processing Sub-module

13‧‧‧Communication module

20‧‧‧ Near Field Communication Receiving Equipment

1 is a flow chart of a method for encrypting and transmitting data of a near field communication device according to the present invention; FIG. 2 is a schematic diagram showing an embodiment of an encryption process in an encrypted transmission method for near field communication device data of the present invention; A schematic diagram of an embodiment of a decryption process in an encrypted transmission method of near field communication device data; and FIG. 4 is a schematic diagram showing the structure of an embodiment of an encrypted transmission system of near field communication device data of the present invention.

In order to make the objects, technical solutions and advantages of the present invention more clear, The present invention will be further described in detail below with reference to the drawings and embodiments.

As shown in FIG. 1 , the method for encrypting and transmitting data of the near field communication device of the present invention includes: Step S1: dividing a near field communication data into a plurality of sub-data to respectively correspond to different near field communication receiving devices; Step S2 And for different near field communication receiving devices, respectively encrypting the sub-data by using different encryption keys; step S3, respectively sending the encryption keys to a plurality of near field communication receiving corresponding to the sub-data Step S4, sending the near field communication data to the near field communication receiving device; step S5, the near field communication receiving device decrypting the sub data corresponding to itself by the received encryption key to obtain the near field communication Receive sub-data messages required by the device.

In the above method of the present invention, the near field communication transmitting device, for example, a mobile phone having a near field communication module, can realize functions such as electronic payment and identity authentication of the mobile phone, wherein the electronic payment can be applied to consumption, traffic card swipe, etc., identity Certification can be applied to company, home access control system certification and personal business card information. The near field communication transmitting device can be a wristband with a near field communication module, an access device with a near field communication module, and a payment device with a near field communication module. Corresponding to the near field communication transmitting device, the near field communication receiving device may include a plurality of devices, such as a mobile phone having a near field communication module, a wristband having a near field communication module, an access control device having a near field communication module, and having Payment equipment for near field communication modules, etc.

The encrypted transmission method of the near field communication device data of the present invention will be specifically described below.

Step S1: The near field communication data is divided into a plurality of sub-data to correspond to different near field communication receiving devices.

As shown in FIG. 2, in the first step of the present invention, for example, the near field communication data stored by the near field communication module in the near field communication transmitting device is divided into n pieces of sub-data, where n is an integer greater than or equal to 1. Each sub-data corresponds to a different near-field communication receiving device, for example, the first sub-data corresponds to the first near-field communication receiving device, and the second sub-data corresponds to the second near-field communication receiving device... the nth sub-data corresponds to the nth near Field communication receiving equipment. Each piece of sub-data is customized according to the user's needs, for example, when the user has three aspects of near field communication application requirements (for example, personal business card information is used to send to other people's near field communication equipment, company access control information is used to enter the company, and residential access control information When the user goes home, the near field communication data message can be divided into three sections of sub-data (storing personal business card information, company access control information and residential access control information).

Step S2: For different near field communication receiving devices, the sub-data is encrypted by using different encryption keys.

With reference to Fig. 2, in the second step of the present invention, for example, for the first near field communication receiving device, the first sub-data is encrypted by the first key, and the second near-field communication receiving device is used for the second near field communication receiving device. The second key encrypts the second sub-data. For the n-th near field communication receiving device, the nth sub-data is encrypted by the n-th key, wherein the first key to the n-th key are different.

Step S3: Send the encryption keys to a plurality of near field communication receiving devices corresponding to the plurality of sub-data.

In step S3 of the present invention, for example, the first key is transmitted to the first near field communication receiving device, and the second key is transmitted to the second near field communication receiving device... The nth key is transmitted to the nth near Field communication receiving equipment. Each near field communication receiving device does not know except The encryption key of the near field communication receiving device outside the body. Each encryption key is only for the sub-data it encrypts in the entire near-field communication data.

In the embodiment of the method for encrypting and transmitting the near field communication device data of the present invention, the near field communication transmitting device may be a mobile phone having a near field communication module. Therefore, in step 3 of the present invention, the near field communication transmitting device may use a short message or E-mail (email), etc., can also use verbal notification, such as voice mode, to send the encryption key to each near-field communication receiving device, which is convenient for the bracelet with near-field communication module and near-field communication mode. The encryption key of the near field communication transmitting device such as the access control device of the group and the payment device with the near field communication module is notified to the corresponding near field communication receiving device.

At this point, the data encryption in the near field communication transmitting device is completed.

Step S4: When performing near field communication, the near field communication transmitting device sends the near field communication data message to the near field communication receiving devices.

In the step S4 of the present invention, the near field communication communication means that the near field communication transmitting device sends the near field communication data information stored in the near field communication module to the near field communication receiving device, for example, has a near field communication module. The operation of the mobile phone for electronic payment or access control card swiping, superior card swiping, etc., the process can be referred to Figure 3.

Step S5: The near field communication receiving device decrypts the sub-data corresponding to the near field communication receiving device by the received encryption key to obtain the sub-data message required by the near field communication receiving device.

For example, in the near field communication module of the near field communication transmitting device, the near field communication data message is divided into n pieces of sub-data, and each sub-data is encrypted by the pre-sequence steps 1 to 3, and the encryption key of each sub-data is encrypted. Each near field communication receiving device corresponding to each piece of sub-data is notified by means of a short message or an e-mail (the first near field communication receiving device corresponds to the first sub-data, the first key, and the first key has been received) , 2nd near field The communication receiving device corresponds to the second sub-data, the second key, and has received the second key. The nth near field communication receiving device corresponds to the nth sub-material, the n-th key, and has received the nth Key), in step 5 of the present invention, the i-th near field communication receiving device in the near field communication transmitting device and the first near field communication receiving device to the nth near field communication receiving device (i-n near field communication receiving device) When the device performs near field communication between the i-th sub-data and the i-th key and has received the i-th key, the near-field communication transmitting device must store the entire near-field communication due to the near-field communication data transmission characteristics. The field communication data is sent to the i-th near field communication receiving device, so the i-th near field communication receiving device receives the entire near field communication data stored by the near field communication transmitting device, but the entire near field communication data is all in the encrypted state at this time. The i-th near-field communication receiving device only has the i-th key for decrypting the i-th sub-data therein, and has no key for decrypting other sub-data, so other sub-data for the i-th near field except the i-th sub-data The communication receiving device is still in an encrypted state, and the sub-data of these encryption states cannot be decrypted by the i-th near-field communication receiving device. Therefore, the sub-data of these encryption states is safe for the i-th near-field communication receiving device, and For the near field communication transmitting device, the i-th near field communication receiving device cannot crack other sub-data. The encrypted transmission method of the invention can ensure the security of the near field communication data sent by a near field communication transmitting device to a plurality of near field communication receiving devices, and realize the protection of the specific data message to be kept secret by the near field communication receiving device.

In step S4 of the present invention, the near field communication transmitting device transmits the near field communication data to the near field communication receiving device, and further informs the near field communication receiving device of the position of the sub-data corresponding to the near field communication receiving device in the near field communication data. This makes it easier for the near field communication receiving device to decrypt the information information it needs. The location of the sub-data encrypted by the encryption key in the entire near-field communication data may be determined by a plurality of methods, for example, in the n-segment data of the near-field communication data, after the i-th sub-data is encrypted by the i-th key, The header and the tail of the sub-data are added with an identifier to indicate that the sub-data of the identification is encrypted by the i-th key. After the data is notified to the i-th near field communication receiving device, the i-th near field communication receiving device can know the position of the sub-data to be decrypted in the near field communication data according to the identifier.

As a practical use example of the encrypted transmission method of the near field communication device data of the present invention, for example, in a mobile phone having a near field communication module (ie, a near field communication transmission device), the near field communication mode is used by, for example, a mobile phone application software. The near-field communication data stored in the group is divided into three sub-data, the first sub-data is used for personal business card information, the second sub-data is used for company access password information, and the third sub-data is used for home access password information; The message, the company access password information, and the home access password information are encrypted by using the first key, the second key, and the third key, respectively, wherein the first key, the second key, and the third key are different; After that, the first key is notified to the relevant near field communication receiving device by means of a short message, an e-mail or, for example, a verbal (such as voice), such as a mobile phone with a near field communication module of a colleague, a customer, or the like; The key is notified to the relevant near field communication receiving device by means of a short message, an email or, for example, manual input, for example, a card reader with a near field communication module of the company's access control system; Informing the relevant near field communication receiving device by means of a short message, an e-mail or, for example, manual input, for example, a card reader having a near field communication module of the home access control system; for the personal business card message of the first sub-data, when performing near When communication between field communication devices, for example, a user with a near field communication module mobile phone exchanges business card information with other users holding a near field communication module mobile phone, a user with a near field communication module mobile phone will When the mobile phone is close to other mobile phones having a near field communication module, the user's mobile phone transmits the entire near field communication data stored by the near field communication module to the mobile phone having the near field communication module, and the other mobile phone is The first sub-data that needs to be decrypted is used to inform the other party's mobile phone, and after receiving the entire near-field communication data, the other mobile phone decrypts the first sub-data in the received near-field communication data by using the first key to obtain the user's Personal business card message; for company access control password information in the second data message section, when communicating between near field communication devices, for example When the user's mobile phone near-field communication module carried in the access card company, has The user of the near field communication module mobile phone approaches the card access device of the near field communication module of the company access control system, and the user's mobile phone sends the entire near field communication data stored by the near field communication module to the card reader. At the same time, the second sub-data that needs to be decrypted by the card reader is notified to the card reader. After receiving the entire near-field communication data, the card reader decrypts the received second sub-data by using the second key, and then the company accesses the device. The system triggers the opening of the password by the verification of the password message; for the home access password information of the third sub-data, when the communication between the near-field communication devices is performed, for example, the user with the near-field communication module mobile phone is at home. When the access control card is swiped, the user with the near field communication module mobile phone approaches the home access control system with the near field communication module card reader, and the user's mobile phone stores the entire near field communication stored by the near field communication module. The data is sent to the card reader, and the third sub-data to be decrypted by the card reader is notified to the card reader, and after the card reader receives the entire near field communication data, By the third key of the received data is decrypted third son, after the home access control system by verifying the password message, which triggers the door.

The embodiment of the present invention simultaneously provides an encrypted transmission system for near field communication device data, as shown in FIG. 4, which includes a near field communication transmitting device 10 and a plurality of near field communication receiving devices 20; wherein the near field communication transmitting device The management module 11 and the communication module 13 are configured to divide the near field communication data in the near field communication transmitting device 10 into a plurality of sub-data to respectively correspond to different near fields. The communication receiving device 20 encrypts the sub-data by using different encryption keys respectively; the communication module 13 is configured to separately send the encryption keys to the plurality of near field communication corresponding to the sub-data. The device 20 is configured to store the encrypted near field communication data, and send the stored near field communication data to the near field communication receiving device when performing near field communication. 20; the near field communication receiving device 20 accepts and stores the encryption keys sent by the communication module 13, and when receiving the communication connection with the near field communication transmitting device, receives the near field sent by the near field communication module 12 After the communication data, the sub-data corresponding to the self-decryption key is decrypted by the received encryption key to obtain the sub-data information required by the near-field communication receiving device 20.

Further, the near field communication module 12 further includes a message processing sub-module 121, and the communication connection near field communication receiving device 20 is configured to notify the corresponding near field communication receiving devices 20 of the positions of the sub-data.

The near field communication transmitting device 10 is a mobile phone with a near field communication module, a wristband with a near field communication module, an access device with a near field communication module, and a payment device with a near field communication module. As a mobile phone with a near field communication module, the management module 11 can be realized by the corresponding software developed by the hardware provided by the mobile phone, and the communication module 13 can be realized by the existing function module in the mobile phone. For example, it is implemented by using a short message transceiving function module and a mobile internet function module. The near field communication receiving device may include a mobile phone having a near field communication function, a wristband having a near field communication function, an access control device having a near field communication function, a payment device having a near field communication function, and the like.

The method and system for encrypting and transmitting near field communication equipment data of the invention divides the near field communication data in the near field communication device into a plurality of sub-data, and encrypts the plurality of sub-data by using different encryption keys respectively, for different children The role or function of the data, respectively, the encryption key of each sub-data is notified to different near-field communication receiving devices, and then the near-field communication receiving device can only use the secret that it knows when performing near-field communication message exchange in different application environments. The key decrypts the corresponding sub-data, and the other sub-data cannot be decrypted because there is no corresponding key, and the encrypted transmission method of the near field communication device data of the present invention The system realizes the near field communication communication between a near field communication transmitting device and a plurality of near field communication receiving devices, and can ensure the security of the data information in the near field communication transmitting device, and realize the specificity to be kept secret for the near field communication receiving device. Protection of data messages.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

S1~S5‧‧‧Steps

Claims (8)

An encryption transmission method for near field communication device data, comprising the steps of: dividing a near field communication data into a plurality of sub-data; and encrypting the sub-data by using one of different unencrypted encryption keys; The unencrypted encryption key is respectively sent to a plurality of near field communication receiving devices corresponding to the plurality of sub-data; the near field communication data is sent to the near field communication receiving devices; and the near field communication receiving devices are received The unencrypted encryption key directly decrypts the sub-data corresponding to itself to obtain the sub-data message required by the near field communication receiving device. The method for encrypting transmission of near field communication device data according to claim 1, wherein the encryption key is separately sent to the near field communication receiving devices corresponding to the sub-data, and the following steps are further included. The encryption keys are separately sent to the near field communication receiving devices by a short message or an email. The method for encrypting transmission of near field communication device data according to claim 1, wherein the step of transmitting the near field communication data to the near field communication receiving device further comprises the step of: setting a position of the sub-data The corresponding near field communication receiving devices are respectively notified. Add the data of the near field communication equipment as described in item 1 of the patent application scope. The dense transmission method, wherein the near field communication receiving equipment has a mobile phone of a near field communication module, a wristband with a near field communication module, an access control device with a near field communication module or a near field communication module One of the payment devices. An encryption transmission system for near field communication equipment data, comprising a near field communication transmission device and a plurality of near field communication receiving devices, wherein the near field communication transmission device comprises: a management module, configured to send the near field communication device A near field communication data is divided into a plurality of sub-data, and each of the sub-data is encrypted by using one of different unencrypted encryption keys; a communication module is configured to separately send the unencrypted encryption keys And the plurality of near field communication receiving devices corresponding to the plurality of sub-data; and a near field communication module for storing the encrypted near field communication data, and when communicating with the near field communication receiving devices, Transmitting the stored near field communication data to the near field communication receiving device; wherein the near field communication receiving devices receive and store the unencrypted encryption keys sent by the communication module, and When the near field communication transmitting device communicates with the connection, after receiving the near field communication data sent by the near field communication module, directly receiving the unencrypted encryption key from the field communication device The son of the corresponding data is decrypted to obtain the desired sub-data message of the near-field communication receiving device. Add the data of the near field communication equipment as described in item 5 of the patent application scope. The near field communication module further includes: a message processing module, and the communication is connected to the near field communication receiving device, and is configured to notify the corresponding near field communication receiving device of the position of the one of the sub-data . The encryption transmission system of the near field communication device data according to claim 5, wherein the near field communication transmission device has a mobile phone of the near field communication module, and has a wristband of the near field communication module, An access device having one of the near field communication modules or a payment device having the near field communication module. For example, the encrypted transmission system of the near field communication device data described in claim 5, wherein the near field communication receiving device is a mobile phone having near field communication function, a wristband with near field communication function, and near field communication One of the features of the access control device or one of the payment devices with near field communication capabilities.