Image Encryption and Decryption Method Based on Probability Interval Division and Dynamic Probability Event
A technology of probability interval and encryption method, which is applied in the direction of encryption device with shift register/memory, image data processing, image data processing, etc.
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[0156] The present invention is described below in conjunction with specific embodiment:
[0157] Taking JAVA jdk1.8.0_20 as the case implementation environment, the implementation of the present invention will be described in detail in conjunction with the accompanying drawings, but not limited to this implementation case, where figure 1 is the flowchart of the encryption method, figure 2 is the flowchart of the decryption method.
[0158] Encryption process:
[0159] Step 1: Select image A, such as image 3 As shown, it is a 256×256 grayscale image Lena, and the encrypted image A=(a i,j ) m×n The corresponding 40-bit hexadecimal SHA-1 value is S SHA-1 =4D27B479AC001B2D07EB2D784659E520DD2E6672, and connect them end to end. Determined by the user not to repeat the starting point G 0 ,G 1 ,G 2 ∈ {0,1,2,...,39}, map it to a sequence of hexadecimal numbers
[0160] For example: G 0 =8,G 1 =16,G 2 = 36 t=65536;
[0161] Step 2: Put Mapped to the initial value ...
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