CN105025203A - Image encryption and decryption method combined with physiological features and image capturing device thereof - Google Patents

Abstract

The present invention provides an image encryption and decryption method and an image capture device combining physiological characteristics. The image encryption and decryption method executes an encryption procedure and a decryption procedure. The encryption procedure includes: using an image capture module to capture a plurality of first iris images respectively. Using the encryption and decryption module to generate a first key according to the plurality of first iris images. When the image capture module generates a photo, the encryption and decryption module is controlled to encrypt the photo using the first key to generate an encrypted photo. The decryption procedure includes: controlling the encryption and decryption module to decrypt the encrypted photo using the first key to restore the photo.

Description

Image Encryption and Decryption Method Combined with Physiological Features and Image Capture Device

technical field

The present invention relates to an image encryption and decryption method, in particular to an image encryption and decryption method capable of combining physiological features, and an image capture device using the method.

Background technique

At present, most of the camera lenses of consumer cameras have more than 10 million pixels, and many high-end mobile phones even have camera lenses with more than 20 million pixels. Coupled with the portability of consumer cameras and mobile phones, people are getting used to using cameras or Mobile phones record all kinds of information in life and work. At the same time, the possibility of storing highly private data in cameras or mobile phones is also increasing.

Therefore, the problem of leakage of user privacy due to leakage of photos from cameras or mobile phones has become more and more serious. When a camera or mobile phone is lost, its owner is often worried about the risk of leaking the private photos in it, or the camera is temporarily taken away by someone who wants to steal the photos.

Although it is currently useful to set a password to access the photos on the camera or mobile phone, this method cannot prevent those who want to access the photos in the camera or mobile phone by stealing the password. Another way It is a setting that can use the application program to encrypt photos. However, once the mobile phone or camera falls into the hands of someone who is familiar with the way the user operates the application program, there is still the possibility of leakage of private data.

Therefore, what is urgently needed is a method that can safely encrypt photos in the camera.

Contents of the invention

In view of the above-mentioned problems in the prior art, the object of the present invention is to provide an image encryption and decryption method combined with physiological characteristics and an image capture device using this method, which can use the irises of a plurality of users as keys, and thereby The key is used as the basis for encryption or decryption of photos in the camera, thereby improving the privacy and security of photos.

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide an image encryption and decryption method combined with physiological characteristics and an image capture device using this method, which can use the effective time range of the key to control the image capture of the camera function and photo encryption and decryption functions to prevent the camera and its photos from being stolen and used.

According to the purpose of the present invention, an image encryption and decryption method combined with physiological characteristics is proposed, which is suitable for an image capture device. The image capture device includes an image capture module, an encryption and decryption module, and a processing module. The image encryption and decryption method can be Including executing an encryption program and a decryption program. The encryption program includes: using the image capture module to capture a plurality of first iris images respectively. The encryption and decryption module is used to generate the first key according to the plurality of first iris images. And when the image capture module generates a photo, the encryption and decryption module is controlled to use the first key to encrypt the photo to generate an encrypted photo. The decryption program includes: controlling the encryption and decryption module to use the first key to decrypt the encrypted photo to restore the photo.

Preferably, the first key has a first valid time, and when the first key is generated within the first valid time, the processing module allows the image capture module to generate photos.

Preferably, the encryption and decryption module generates a second key according to a plurality of second iris images, and when the second key is equal to the first key, the processing module controls the encryption and decryption module to use the second key to decrypt the encrypted photo to restore photo.

Preferably, the second key has a second valid time, and when the second key is generated within the second valid time, the processing module allows the encryption and decryption module to use the second key to decrypt the encrypted photo to restore the photo.

Preferably, the image capture device further includes a display module, and the image encryption and decryption method further includes: using the display module to display a sequence prompt message when capturing a plurality of first iris images.

According to the purpose of the present invention, an image capture device using physiological characteristics for image encryption and decryption is provided, which includes an image capture module, an encryption and decryption module, and a processing module. The image capturing module is used for capturing a plurality of first iris images or for generating photos. The encryption and decryption module can generate a first key according to the plurality of first iris images and use the first key to encrypt the photo to generate an encrypted photo, or use the first key to decrypt the encrypted photo. The processing model controls the encryption and decryption module to use the first key to generate an encrypted photo, or controls the encryption and decryption module to use the first key to decrypt the encrypted photo to restore the photo.

Preferably, the first key has a first valid time, and when the first key is generated within the first valid time, the processing module allows the image capture module to generate photos.

Preferably, the encryption and decryption module generates a second key according to a plurality of second iris images, and when the second key is equal to the first key, the processing module controls the encryption and decryption module to use the second key to decrypt the encrypted photo to restore photo.

Preferably, the second key has a second valid time, and when the second key is generated within the second valid time, the processing module allows the encryption and decryption module to use the second key to decrypt the encrypted photo to restore the photo.

Preferably, the image capturing device of the present invention further includes a display module for displaying a sequence prompt message when capturing a plurality of first iris images.

Description of drawings

FIG. 1 is a block diagram of an image capture device using physiological characteristics for image encryption and decryption according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an image capture device using physiological characteristics for image encryption and decryption according to an embodiment of the present invention.

FIG. 3 is a flow chart of the steps of the encryption procedure of the image encryption and decryption method combined with physiological characteristics according to the second embodiment of the present invention.

FIG. 4 is a flowchart showing the steps of the decryption procedure of the image encryption and decryption method combined with physiological characteristics according to the third embodiment of the present invention.

Detailed ways

Please refer to FIG. 1 , which is a block diagram of an image capture device using physiological characteristics for image encryption and decryption according to an embodiment of the present invention. The image capture device 10 using physiological features for image encryption and decryption includes an image capture module 25 , an encryption and decryption module 26 and a processing module 27 . The image capture module 25 can be a lens, which can be used to capture a plurality of first iris images 22 of a plurality of first users (not shown in the figure), capture a plurality of second users (not shown in the figure) A plurality of second iris images 24 or capture images of the surrounding environment to generate a photo 32, wherein the image capture device 10 using physiological characteristics for image encryption and decryption can be a camera or a smart phone.

The encryption and decryption module 26 can be an application software, which can generate a first key 29 according to a plurality of first iris images 22, and can use the first key 29 to encrypt the photo 32 to generate an encrypted photo 31, or At different time points, the second key 30 is generated according to the plurality of second iris images 24 to decrypt the encrypted photo 31, wherein the first key 29 and the second key 30 have a first valid time 33 and a second valid time respectively. Time 34, and the encryption and decryption module 26 can first use the variance method (variance) or the cumulative distribution function method (cumulative histogram) to normalize the plurality of first iris images 22 or the plurality of second iris images 24, and then generate the first key 29 or a second key 30.

The processing module 27 may include a processor, the processing module 27 allows the image capture module 25 to generate the photo 32, controls the encryption and decryption module 26 to encrypt the photo 32 with the first key 29 to generate an encrypted photo 31, and controls the encryption and decryption module 26 The encrypted photo 31 is decrypted with the second key 30 . When the generation time of the first key 29 does not exceed the first valid time 33 , the processing module 27 can allow the image capture module 25 to generate the photo 32 and use the encryption and decryption module 26 to generate the encrypted photo 31 . When the encrypted photo 31 needs to be decrypted, if the generation time of the first key 29 does not exceed the first valid time 33, the processing module 27 can set the first key 29 as the second key 30, and control the encryption and decryption module 26 The encrypted photo 31 is decrypted. Alternatively, if the generation time of the first key 29 exceeds the first validity time 33 , the processing module 27 may control the encryption and decryption module 26 to decrypt the encrypted photo 31 according to the second key 30 . Wherein, the condition that decryption can be performed is that when the second key 30 is equal to the first key 29 and the generation time length of the second key 30 does not exceed the second valid time 34, the processing module 27 can control the encryption and decryption module 26 to decrypt the encrypted Photo 31 to restore photo 32.

For example, the user can set the first valid time 33 of the first key 29 to 3 hours. Within 3 hours, the user can use the image capture device 10 that uses physiological characteristics for image encryption and decryption to perform The function of taking pictures and encrypting 32 photos, once more than 3 hours, you can no longer take pictures. On the other hand, within the 3 hours, the user can use the encryption and decryption module 26 and the first key 29 to decrypt the encrypted photo 31 to view the captured photo 32 . In this way, in case the image capture device 10 is lost, once the first valid time 33 of the first key 29 is exceeded, the image capture device 10 that utilizes physiological characteristics for image encryption and decryption cannot perform image capture. function, the user does not need to worry about the leaking of the photos 32 therein. When the generation time of the first key 29 exceeds the first valid time 33 , the user can take another photo of the user's iris image to obtain the second key 30 to decrypt the encrypted photo 31 and browse the photo 32 .

To further illustrate, the camera 100 of this invention using physiological characteristics for image encryption and decryption may further include a display module 28, which may be a screen, and may include an interface on it to display and capture a plurality of first irises The sequence of the image 22 or the plurality of second iris images 24 prompts messages to remind the user how to collect the iris images.

Please refer to FIG. 2 , which is a schematic diagram of an image capture device using physiological characteristics for image encryption and decryption according to an embodiment of the present invention. In this embodiment, the camera 100 is used as an example to capture an image for encryption and decryption, but it is not limited thereto. When using the camera 100 to take pictures, firstly, the first iris image 22 of the plurality of first users 21 must be image-captured, and then the encryption and decryption module 26 in the camera 100 according to the plurality of first irises The image 22 generates a first key 29 , and the photos generated by the camera 100 are all encrypted photos 31 , and the encryption method is encrypted by the first key 29 .

When the user wants to watch the content of the encrypted photo 31 produced by the camera 100, if the encryption and decryption module 26 has a second key 30 and this second key 30 is equal to the first key 29, the user can pass The encryption and decryption module 26 uses the second key 30 to decrypt the encrypted photo 31 to restore the original photo 32 . But if there is no second key 30 or the timeliness of the second key 30 has expired, then the action of image capture must be performed on the second iris images 24 of a plurality of second users 23, wherein the plurality of second iris images 24 The second user 23 must be equal to the plurality of first users 21. Since each person's iris is unique, the second key 30 generated through the plurality of second iris images 24 will also be equal to the first key 29. The encryption and decryption module 26 can use the second key 30 to restore the encrypted photo 31 .

Further explanation, this encryption and decryption module 26 can be a software application program or a mobile phone application program, so it can also be executed on a computer 36 or a smart mobile phone, when the user places the encrypted photo 31 on the computer 36 , as long as the computer 36 also has the second key 30, the user can use the encryption and decryption module 26 to decrypt the encrypted photo 31 to restore the original photo 32.

Please refer to FIG. 3 , which is a flow chart of the encryption procedure of the image encryption and decryption method combined with physiological characteristics according to the second embodiment of the present invention. This image encryption and decryption method combined with physiological features is suitable for a camera, and it includes three steps as follows.

Step S1 utilizes an image capture module to capture a plurality of first iris images of a plurality of first users. Step S2 utilizes the encryption and decryption module to generate a first key according to the plurality of first iris images, wherein the first key has a first valid time. Step S3 means that when the first key is generated and within the first valid time, the processing module allows the image capture module to capture the image of the surrounding environment to generate a photo, and controls the encryption and decryption module to use the first key The photo is encrypted to generate an encrypted photo. Its execution method is as shown in FIG. 2 , using the camera 100 to capture the iris image of the first user 21 , and then generating a first key 29 and using the first key 29 to generate an encrypted photo 31 .

Please refer to FIG. 3 , which is a flow chart of the decryption procedure of the image encryption and decryption method combined with physiological characteristics according to the third embodiment of the present invention. It includes five steps as follows. Step S4 first judges whether the first key exists, if yes, execute step S5; if not, execute step S6-step S8. Step S5 is to control the encryption and decryption module to use the first key to decrypt the encrypted photo to restore the photo. Step S6 is to use the image capture module to capture a plurality of second iris images of a plurality of second users. Step S7 is to use the encryption and decryption The module generates a second key according to a plurality of second iris images, and the second key has a second valid time. Step S8 means that when the second key is equal to the first key and the second key is generated, Within two valid times, the processing module controls the encryption and decryption module to use the second key to decrypt the encrypted photo to restore the photo. Steps S6-S8 are executed in the same way as shown in FIG. 2 by using the camera 100 to capture a plurality of second iris images 24 to generate a second key 30 and use the second key 30 to decrypt the encrypted photo 31 .

Based on the above, it can be seen that through the image encryption and decryption method combined with physiological characteristics and the camera using physiological characteristics for image encryption and decryption of the present invention, multiple users' irises can be used as a key, and the key can be used as a photo in the camera. The basis for encryption or decryption, thereby improving the privacy and security of photos. In addition, the present invention also sets an effective time for the key, which can be used to control the camera's image capture function and photo encryption and decryption functions, so as to prevent the camera and the photos in it from being stolen and used.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that the spirit of the present invention as defined by the following claims and their equivalents will be understood. Various changes in form and details may be made therein.

Claims (10)

1. An image encryption and decryption method combined with physiological characteristics, which is suitable for an image capture device. The image capture device includes an image capture module, an encryption and decryption module, and a processing module. The image encryption and decryption method includes: Execute an encryption program, the encryption program includes: using the image capture module to respectively capture a plurality of first iris images; using the encryption and decryption module to generate a first key according to the plurality of first iris images; and When the image capture module generates a photo, controlling the encryption and decryption module to encrypt the photo with the first key to generate an encrypted photo; and Execute the decryption program, the decryption program includes: The encryption and decryption module is controlled to decrypt the encrypted photo by using the first key to restore the photo. 2. The image encryption and decryption method according to claim 1, wherein the first key has a first valid time, and when the first key is generated within the first valid time, the The processing module allows the image capture module to generate the photo. 3. The image encryption and decryption method according to claim 1, wherein the encryption and decryption module generates a second key according to a plurality of second iris images, and when the second key is equal to the first key, the The processing module controls the encryption and decryption module to use the second key to decrypt the encrypted photo to restore the photo. 4. The image encryption and decryption method according to claim 3, wherein the second key has a second valid time, and when the second key is generated within the second valid time, the processing The module allows the encryption and decryption module to decrypt the encrypted photo using the second key to restore the photo. 5. The image encryption and decryption method according to claim 1, wherein the image capture device further comprises a display module, and the image encryption and decryption method further comprises: using the display module to display and capture the plurality of first irises Prompt message for the sequence of images. 6. An image capture device using physiological characteristics for image encryption and decryption, comprising: an image capture module, used to capture a plurality of first iris images or to generate photos; an encryption and decryption module, based on the plurality of iris images The first iris image generates a first key and uses the first key to encrypt the photo to generate an encrypted photo, or uses the first key to decrypt the encrypted photo; and the processing module is a control The encryption and decryption module uses the first key to generate the encrypted photo, or controls the encryption and decryption module to use the first key to decrypt the encrypted photo to restore the photo. 7. The image capture device according to claim 6, wherein the first key has a first valid time, and when the first key is generated within the first valid time, the processing A module allows the image capture module to generate the photo. 8. The image capture device according to claim 6, wherein the encryption and decryption module generates a second key according to a plurality of second iris images, and when the second key is equal to the first key, the The processing module controls the encryption and decryption module to use the second key to decrypt the encrypted photo to restore the photo. 9. The image capture device according to claim 8, wherein the second key has a second valid time, and when the second key is generated within the second valid time, the processing module The encryption and decryption module is allowed to use the second key to decrypt the encrypted photo to restore the photo. 10. The image capture device as claimed in claim 6, further comprising a display module to display a sequence prompt message when capturing the plurality of first iris images.