Pixel value double-replacement and pixel position chaotic encryption algorithm
A pixel position, chaotic encryption technology, applied in the field of encryption, can solve the problems of inability to guarantee image security, image pixel position scrambling, image pixel value scrambling, etc., to achieve optimized encryption effect, strong security, and uniform pixel distribution. Effect
Inactive Publication Date: 2018-06-08
QINZHOU JINGTONG TECH CO LTD
View PDF2 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, most chaotic encryption algorithms are essentially a single image pixel value scrambling or image pixel position scrambling, and a single use of any of them cannot guarantee that the image has high security, and there are certain security risks
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0027] A chaotic encryption algorithm for pixel value double replacement and pixel position is realized by the following steps:
[0028] Step 1, performing pixel position replacement on the digital image, that is, encrypting the pixel position;
[0029] Specifically: (1) Scan the digital image matrix Am'n by row to form a one-dimensional sequence P{P1, P2, ..., Pm'n} with a length of m'n;
[0030] (2) Use the Logistic chaotic function to generate a chaotic sequence L{L1, L2, ..., Lm'n} of length m'n, and combine L{L1, L2, ..., Lm'n} with P{P1 , P2,..., Pm′n} elements in one-to-one correspondence;
[0031] (3) Sort the m'n values of the generated chaotic sequence L{L1, L2, ..., Lm'n} from small to large to form an ordered sequence L'{L'1, L'2, ... ..., L'm'n}, since L{L1, L2, ..., Lm'n} corresponds to elements in P{P1, P2, ..., Pm'n} one by one, P{P1, P2 ,...,Pm'n} is also replaced by P'{P'1,P'2,...,P'm'n} by the same substitution rule;
[0032] (4) The one-dimensional se...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
Provided is a pixel value double-replacement and pixel position chaotic encryption algorithm, which is mainly realized through the following steps: carrying out pixel position replacement on a digitalimage, that is, carrying out pixel position encryption; carrying out pixel value transformation on an encrypted image obtained after pixel position encryption, that is, carrying out encryption on pixel value of each pixel of the encrypted image by setting an encryption algorithm, changing R,G, B values, or even changing the Alpha value, of the encrypted image to obtain an encrypted image; and carrying out a decryption algorithm on the image. The algorithm carries out displacement on pixel position and pixel values by utilizing a Logistic chaotic sequence; distribution of encrypted image pixelpoints is relatively uniform, and an original image is fully covered, so that detail information of the original image cannot be obtained; and compared with an existing encryption algorithm, the encryption algorithm is infinite in key space, and multiple chaotic sequences are applied in the encryption process, thereby greatly increasing the key space, and enabling the whole encryption algorithm to both have a better encryption effect, but also have high safety.
Description
technical field [0001] The invention relates to the field of encryption technology, in particular to a chaotic encryption algorithm for pixel value double replacement and pixel position. Background technique [0002] Chaotic image encryption technology is a digital image encryption technology that has been widely used in recent years. Chaos phenomenon refers to the deterministic and random-like processes that appear in nonlinear dynamic systems. Chaotic dynamics has developed rapidly on this basis. Chaos can be used as a new cryptographic system, which can encrypt text, sound and image data. In 1997, Fridrich applied the chaotic encryption method to image encryption for the first time. Subsequently, chaotic image encryption technology became a hot spot in the research of digital image encryption technology. [0003] The principle of chaotic encryption is to perform specific operations on the original information and the chaotic sequence generated by the chaos generator, so ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 不公告发明人
Owner QINZHOU JINGTONG TECH CO LTD