CN105426721A - Picture encryption method and device - Google Patents

Abstract

The present invention discloses a method and device for encrypting an image. The method specifically comprises: selecting at least one image to be encrypted; determining an area to be encrypted in the image to be encrypted, wherein the area to be encrypted is a partial area of the image to be encrypted and includes at least one sub-area to be encrypted; encrypting the area to be encrypted to obtain an encrypted image. By adopting the above method, the image to be encrypted can be directly encrypted, and the local area of the image to be encrypted can be encrypted, making the operation simple and convenient, and improving the user experience.

Description

Method and device for image encryption

technical field

The present invention relates to the technical field of image encryption, in particular to a method and device for image encryption.

Background technique

With the rapid development of mobile terminals, users are increasingly dependent on mobile terminals. Users usually use mobile terminals to fulfill various needs, such as shopping, booking tickets, or querying maps. Therefore, mobile terminals carry a large amount of customer sensitive information, and sufficient security protection measures are required. Due to the uniqueness of fingerprint data, it is widely used in the security protection of mobile terminals.

At present, fingerprint recognition technology on mobile terminals is often used in screen unlocking, terminal payment, application login and data encryption, etc. When encrypting a user's private picture, fingerprint encryption is usually performed on the application program (APP) where the picture is located.

There are not only pictures encrypted by the user in the APP, but also pictures that the user does not encrypt. Every time the user views an unencrypted picture, the APP must also be unlocked. In addition, users also need to unlock the APP when using the APP on a daily basis. That is, there is a problem that pictures cannot be encrypted separately, which makes the application process cumbersome and reduces user experience.

Contents of the invention

In view of this, the embodiments of the present invention provide a method and device for encrypting pictures, so as to solve the technical problem in the prior art that pictures cannot be encrypted alone.

In the first aspect, the embodiment of the present invention provides a method for encrypting pictures, including:

Select at least one image to be encrypted;

Determining an area to be encrypted in the picture to be encrypted, the area to be encrypted is a partial area of the picture to be encrypted and includes at least one sub-area to be encrypted;

Encrypt the area to be encrypted to obtain an encrypted picture.

In the second aspect, the embodiment of the present invention also provides a device for encrypting pictures, including:

A picture selection module to be encrypted is used to select at least one picture to be encrypted;

A region to be encrypted determining module, configured to determine a region to be encrypted in the picture to be encrypted, the region to be encrypted is a partial region of the picture to be encrypted and includes at least one subregion to be encrypted;

An encryption module, configured to encrypt the area to be encrypted to obtain an encrypted picture.

The image encryption method and device provided by the embodiments of the present invention select at least one image to be encrypted, determine the area to be encrypted of the image to be encrypted, and encrypt the area to be encrypted to obtain the encrypted image. By adopting the above image encryption method and device, the image that needs to be encrypted can be directly encrypted without encrypting the application program where the image is located, which makes the operation easier, and can encrypt a partial area of the image to be encrypted, which is convenient for users to identify Encrypt pictures to improve user experience.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a flow chart of a method for encrypting a picture provided in Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of pixels before encryption provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of encrypted pixels provided by Embodiment 1 of the present invention;

FIG. 4 is a flow chart of a method for encrypting a picture provided in Embodiment 2 of the present invention;

FIG. 5 is a flow chart of a method for encrypting a picture provided by Embodiment 3 of the present invention;

FIG. 6 is a structural diagram of an image encryption device provided by Embodiment 4 of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

Embodiment one

FIG. 1 is a flowchart of a method for encrypting a picture provided by Embodiment 1 of the present invention. The method in this embodiment is specifically used in the case of encrypting a picture that needs to be encrypted. The method of this embodiment can be executed by a device for encrypting pictures, which can be realized by software and/or hardware, and integrated in a terminal for encrypting pictures. As shown in Figure 1, the method includes:

Step 110. Select at least one picture to be encrypted.

Exemplarily, the terminal may select at least one picture that needs to be encrypted according to the user's requirement, for example, use the picture selected by the user as the picture that needs to be encrypted. The picture may be a picture taken by the user, a picture downloaded or a picture saved by the user, and the like. The terminal may be a mobile phone, a tablet computer, or a notebook computer.

Step 120. Determine a to-be-encrypted area in the to-be-encrypted picture, where the to-be-encrypted area is a partial area of the to-be-encrypted picture and includes at least one to-be-encrypted sub-area.

Exemplarily, to determine the area to be encrypted of the picture to be encrypted, the determination method can be to determine the area to be encrypted according to the user's choice, or to set a fixed sub-area in the picture as the area to be encrypted, or to determine the area to be encrypted according to preset rules The specific determination method of the area can be set according to the actual situation. For example, if the center point of the picture displayed on the terminal screen is set as the center point, and the circular area with a radius of 5 pixels is set as the area to be encrypted, then the area to be encrypted for at least one picture to be encrypted selected in the terminal is set to this circular area. Or after selecting the picture to be encrypted, the terminal identifies the area where the digital information in the picture is located as the area to be encrypted according to the preset rules, or identifies the area where the human body information in the picture is located as the area to be encrypted. The area to be encrypted is a part of the image to be encrypted but not the entire area. The area to be encrypted may contain at least one sub-area to be encrypted, and the sub-area to be encrypted may contain at least one sensitive information, such as digital information or avatar information. For example, a picture to be encrypted contains the user's identity information and avatar information, and the terminal determines the area where the identity information is located as a sub-area to be encrypted according to the user's choice, and the area where the avatar information is located is another sub-area to be encrypted , when encrypting the picture, only these two sub-regions need to be encrypted, instead of encrypting the whole picture, which can reduce the workload of encryption.

Step 130: Encrypt the area to be encrypted to obtain an encrypted picture.

Exemplarily, after determining the to-be-encrypted area of the image to be encrypted, the to-be-encrypted sub-area contained in the to-be-encrypted area is encrypted. The specific encryption method can be set according to the actual situation, such as Gaussian blur processing, image sharpening processing , or image filter processing, etc. Preferably, Gaussian blur processing is performed on each sub-region to be encrypted contained in the region to be encrypted, and the method of Gaussian blur processing is: update the pixel value of each pixel to be processed to the average value of the pixel values of surrounding pixels value for obfuscation. Further, the encryption degree of each to-be-encrypted sub-region is determined, wherein the encryption degree of each to-be-encrypted sub-region is the same or different. The encryption degree is the encryption blur degree set by the terminal for each sub-area to be encrypted, that is, when Gaussian blur processing is performed, the range of surrounding pixels selected for the pixels to be processed in each sub-area to be encrypted is different, so that each The encryption degree of the sub-areas to be encrypted is different. The encryption degree can be set for each sub-area to be encrypted according to the actual needs of the user, or the same encryption degree can be set uniformly for the encrypted area, that is, the encryption degree of each sub-area to be encrypted can be the same or different. . Fig. 2 is a schematic diagram of pixels before encryption provided by Embodiment 1 of the present invention. As shown in Fig. 2, pixel 21 is a pixel to be processed, and the remaining points are surrounding pixels of pixel 21, wherein the pixel value of pixel 21 is 2. The pixel value of the remaining points is 1, and the average value obtained after the average calculation is 1, that is, the pixel value of pixel 21 after encryption is 1. FIG. 3 is a schematic diagram of encrypted pixels provided by Embodiment 1 of the present invention. As shown in FIG. 3 , pixel 31 is the encrypted pixel of pixel 21 in FIG. 2 , and its pixel value is 1. After encrypting each sub-area to be encrypted, an encrypted picture is obtained, and the encrypted picture replaces the original picture and is displayed on the terminal.

A method for encrypting a picture provided by Embodiment 1 of the present invention, by selecting at least one picture to be encrypted, determining the area to be encrypted of the picture to be encrypted, the area to be encrypted includes at least one sub-area to be encrypted, and encrypting the area to be encrypted Then get the encrypted picture. Using the method of this embodiment, the picture can be encrypted separately, without needing to encrypt the application program where the picture is located, which makes the operation easier, and can select some areas of the picture for encryption, reducing the encryption workload, and is convenient for users to Identify encrypted images in unencrypted areas to improve user experience.

Embodiment two

FIG. 4 is a flowchart of a method for encrypting a picture provided by Embodiment 2 of the present invention. This embodiment is further optimized on the basis of the first embodiment.

Further, before the user selects at least one picture to be encrypted, an encryption instruction is obtained, the user fingerprint is collected, and the user fingerprint is matched with the fingerprint sample in the local fingerprint database. If the match is successful, the user fingerprint is set as decryption. Fingerprint, the specific process of the method includes:

Step 410, obtaining an encrypted instruction.

Exemplarily, after the terminal acquires the encryption instruction, it starts to execute the encryption step. The encryption command may be an encryption option in the setting options of the terminal or application program, and the encryption step is executed when the encryption option is enabled or selected.

Step 420, collect user fingerprints, and match the user fingerprints with fingerprint samples in the local fingerprint database.

Exemplarily, after obtaining the encryption instruction, an encryption key is set. The encryption key may be the user's fingerprint data obtained by the terminal, or set an input password according to the content input by the user, and is preferably fingerprint data. Collect the user's fingerprint, and match the user's fingerprint with the fingerprint sample in the local fingerprint database. If the match is successful, it means that the user who issued the encryption command is a legal user of the terminal. If the match is unsuccessful, it may be that other users use the terminal to encrypt pictures. At this time, a prompt tone can be issued to remind the user that other users use the terminal to perform image encryption operations, thereby improving security.

Step 430: If the matching is successful, set the user fingerprint as a decryption fingerprint.

Exemplarily, if the user fingerprint is successfully matched with the fingerprint samples in the local fingerprint database, the user fingerprint collected by the terminal is used as the decryption fingerprint of the encrypted picture, that is, the encrypted picture can be decrypted only when the decryption fingerprint is input.

Step 440. Select at least one picture to be encrypted.

Step 450. Determine a to-be-encrypted area in the to-be-encrypted picture, where the to-be-encrypted area is a partial area of the to-be-encrypted picture and includes at least one to-be-encrypted sub-area.

Step 460: Encrypt the area to be encrypted to obtain an encrypted picture.

Embodiment 2 of the present invention provides a method for encrypting pictures. After obtaining the encryption instruction, the fingerprint of the user is collected and matched with the fingerprint samples in the local fingerprint database. If the match is successful, the fingerprint is used as the decrypted fingerprint. By setting decryption fingerprints for encrypted pictures, the uniqueness of fingerprint data can be used to improve the security of picture encryption and better protect the security and privacy of users.

Embodiment three

FIG. 5 is a flowchart of a method for encrypting a picture provided by Embodiment 3 of the present invention. This embodiment is further optimized on the basis of the second embodiment, and the decryption of encrypted pictures is further limited.

Further, the encrypted picture is selected, the user fingerprint is collected, and the currently collected user fingerprint is matched with the decrypted fingerprint. If the match is successful, the original picture corresponding to the selected encrypted picture is displayed. If the match is unsuccessful, the encrypted picture is displayed. The process of the method specifically includes:

Step 510, selecting an encrypted picture.

Exemplarily, the encrypted picture is a picture that has been partially encrypted, and the user may be prompted to select a desired encrypted picture as the picture to be decrypted according to the unencrypted area. The terminal can select at least one encrypted picture according to the user's needs. If the encryption key of the currently selected encrypted picture is not the same as the encryption key of the selected encrypted picture, it can prompt the user that the current encrypted picture cannot be encrypted with the selected encrypted picture at the same time. decryption operation.

Step 520, collect user fingerprints, and match the currently collected user fingerprints with the decrypted fingerprints.

Exemplarily, after the encrypted picture is selected, the user is prompted to input the encryption key, preferably, the user is prompted to input the decryption fingerprint. After the terminal collects the fingerprint input by the user, it matches the currently collected user fingerprint with the set decryption fingerprint.

Step 530: If the matching is successful, display the original picture corresponding to the selected encrypted picture; if the matching is unsuccessful, display the encrypted picture.

Exemplarily, if the collected user fingerprint matches the decrypted fingerprint successfully, the original picture corresponding to the selected encrypted picture is displayed, and at this time, the terminal can directly display the information in the picture; if the match is unsuccessful, the encrypted picture is displayed, that is The terminal cannot directly display the information in the picture to the user.

A method for encrypting pictures provided by Embodiment 3 of the present invention, by selecting an encrypted picture, collecting user fingerprints and matching them with the decrypted fingerprints, if the matching is successful, the original picture corresponding to the selected encrypted picture will be displayed; if the matching is unsuccessful, then Display the encrypted picture. Encrypted pictures can be quickly and accurately displayed through fingerprint matching. When decrypting, only the picture needs to be decrypted, and the application program where the picture is located does not need to be decrypted, which makes the decryption process of the encrypted picture simple and improves the user experience.

Embodiment Four

FIG. 6 is a structural diagram of an image encryption device provided by Embodiment 4 of the present invention. As shown in FIG. 6 , the device includes: a picture to be encrypted selection module 601 , a region to be encrypted determination module 602 and an encryption module 603 .

Among them, the picture to be encrypted selection module 601 is used to select at least one picture to be encrypted; the area to be encrypted determination module 602 is used to determine the area to be encrypted in the picture to be encrypted, and the area to be encrypted is the area to be encrypted The partial area of the picture includes at least one sub-area to be encrypted; the encryption module 603 is configured to encrypt the area to be encrypted to obtain an encrypted picture.

Further, the device may further include: an acquisition module, a collection module and a decryption fingerprint setting module.

Wherein, the obtaining module is used to obtain encryption instructions; the collection module is used to collect user fingerprints, and the user fingerprints are matched with the fingerprint samples in the local fingerprint database; If the fingerprint samples in the database are successfully matched, the user fingerprint is set as the decryption fingerprint.

Preferably, the device may further include: an encrypted picture selection module, a matching module and a picture display module.

Wherein, the encrypted picture selection module is used to select encrypted pictures; the matching module is used to collect user fingerprints and matches the currently collected user fingerprints with the decrypted fingerprints; the picture display module is used to match the currently collected user fingerprints with the If the decrypted fingerprint matches successfully, the original picture corresponding to the selected encrypted picture will be displayed; if the match is unsuccessful, the encrypted picture will be displayed.

Further, the encryption module is specifically configured to perform Gaussian blurring encryption on each sub-area to be encrypted included in the area to be encrypted.

On the basis of the above embodiments, the encryption module may include: an encryption level setting unit and a Gaussian encryption unit.

Wherein, the degree of encryption setting unit is used to determine the degree of encryption of each sub-region to be encrypted; wherein the degree of encryption of each sub-region to be encrypted is the same or different; the Gaussian encryption unit is used to adopt Gaussian blur according to the degree of encryption of each sub-region to be encrypted The processing algorithm encrypts the corresponding sub-areas to be encrypted.

An image encryption device provided in Embodiment 4 of the present invention determines the area to be encrypted of the image to be encrypted by selecting at least one image to be encrypted, the area to be encrypted includes at least one sub-area to be encrypted, and the area to be encrypted is determined. After the area is encrypted, an encrypted picture is obtained. The device of this embodiment can encrypt the picture separately, without encrypting the application program where the picture is located, making the operation easier and improving the user experience, and can encrypt the partial area of the picture to be encrypted, reducing the encryption workload .

The image encryption device provided in the embodiment of the present invention is used to execute the image encryption method provided in the embodiment of the present invention, and has corresponding functions and beneficial effects.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. a method for image ciphering, is characterized in that, comprising:

Select at least one picture to be encrypted;

Determine the region to be encrypted in described picture to be encrypted, described region to be encrypted is the subregion of described picture to be encrypted and comprises at least one subregion to be encrypted;

Described region to be encrypted is encrypted, obtains encrypting picture.

2. method according to claim 1, is characterized in that, before selecting at least one picture to be encrypted, also comprises:

Obtain encrypted instruction;

Gather user fingerprints, described user fingerprints is mated with sample fingerprint in local fingerprint base;

If the match is successful, then described user fingerprints is set to decrypt fingerprint.

3. method according to claim 2, is characterized in that, is encrypted described region to be encrypted, after obtaining encryption picture, also comprises:

Choose encryption picture;

Gather user fingerprints, the user fingerprints of current collection is mated with described decrypt fingerprint;

If the match is successful, then show the original image that the encryption picture chosen is corresponding, if mate unsuccessful, then show described encryption picture.

4. the method according to any one of claim 1-3, is characterized in that, is encrypted comprises described region to be encrypted:

The subregion each to be encrypted comprised described region to be encrypted respectively carries out Gaussian Blur process encryption.

5. method according to claim 4, is characterized in that, the described subregion each to be encrypted comprised described region to be encrypted respectively carries out Gaussian Blur process encryption and comprises:

That determines each subregion to be encrypted adds density; Wherein each subregion to be encrypted to add density identical or different;

The density that adds according to each subregion to be encrypted adopts Gaussian Blur Processing Algorithm to be encrypted corresponding subregion to be encrypted.

6. a device for image ciphering, is characterized in that, comprising:

Module selected by picture to be encrypted, for selecting at least one picture to be encrypted;

Area determination module to be encrypted, for determining the region to be encrypted in described picture to be encrypted, described region to be encrypted is the subregion of described picture to be encrypted and comprises at least one subregion to be encrypted;

Encrypting module, for being encrypted described region to be encrypted, obtains encrypting picture.

7. device according to claim 6, is characterized in that, also comprises:

Acquisition module, for obtaining encrypted instruction;

Acquisition module, for gathering user fingerprints, mates described user fingerprints with sample fingerprint in local fingerprint base;

Decrypt fingerprint arranges module, if the match is successful for sample fingerprint in described user fingerprints and local fingerprint base, then described user fingerprints is set to decrypt fingerprint.

8. device according to claim 7, is characterized in that, also comprises:

Encryption picture chooses module, for choosing encryption picture;

Matching module, for gathering user fingerprints, mates the user fingerprints of current collection with described decrypt fingerprint;

Picture display module, if the match is successful for the user fingerprints of current collection and described decrypt fingerprint, then shows the original image that the encryption picture chosen is corresponding, if mate unsuccessful, then shows described encryption picture.

9. the device according to any one of claim 6-8, is characterized in that, encrypting module specifically for:

The subregion each to be encrypted comprised described region to be encrypted respectively carries out Gaussian Blur process encryption.

10. method according to claim 9, is characterized in that, encrypting module comprises:

Add density setting unit, add density for what determine each subregion to be encrypted; Wherein each subregion to be encrypted to add density identical or different;

Gauss's ciphering unit, adopts Gaussian Blur Processing Algorithm to be encrypted corresponding subregion to be encrypted for the density that adds according to each subregion to be encrypted.