Encryption or decryption implementing method, device and system
A key and key generation technology, applied in the field of information security, can solve the problems of difficult image decryption process, large storage cost, large amount of calculation, etc., and achieve the effects of reducing complexity, low storage cost, and convenient operation.
Inactive Publication Date: 2007-09-12
WUXI ZGMICRO ELECTRONICS CO LTD
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Problems solved by technology
Although the method of changing the pixel value can obtain a very good encryption effect, for example, using the Fast Fourier Transform Algorithm (FFT) to transform the pixel value to obtain the pixel in the frequency domain, but due to the Due to the effect of low-pass filtering, the encrypted pixel value currently transmitted has changed, making the decryption process of the image extremely difficult
There are many specific processing methods for disrupting pixel addresses, such as based on chaotic sequence, m-sequence, etc. The common point of these processing methods is based on the content characteristics of the image, and the encryption of the image is realized by completely disrupting the order of the pixels, but , such an encryption method has a very large amount of calculation, and also has the problem of difficult decryption, and for TV signals, the field image needs to be cached during the encryption or decryption process, the storage cost is very high, and the stability is poor
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[0044] Figure 2 is a schematic structural diagram of a device for implementing image encryption in an embodiment of the present invention. As shown in Figure 2, the device for implementing image encryption includes: a column label generation unit, a segmentation unit, and a reverse order unit, wherein the column label generation unit is used for Generate a column label according to the key, and provide the column label to the segmentation unit. The key can be composed of multiple eight-bit integer data. The key can be preset or generated according to the set key algorithm; the segmentation unit It is used to segment the image data according to the received column label, and provide each image data segment to the reverse sequence unit; the reverse sequence unit is used to receive each image data segment, and send each image data segment sequentially according to the set transmission order. The column label is the basis for the segmentation unit to segment the image data. The nu...
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The invention discloses an encrypting or decrypting method, device and system, relating to the information safety technique. An encryption end generates a column marker according to secret key and segments an to-be-transmitted image according to the column marker, and then sends each image data segment in the set transmission sequence; by the set transmission sequence, it makes the sequence of transmitting each image data segment inconsistent with the original sequence of each image data segment so as to make the sequence of each image data segment received by a decryption end have been disordered, so as to implement image encryption. And the encryption algorithm is simple and easy to apply, and convenient to operate, and largely reducing complexity of image encryption algorithm and reducing complexity of follow-up decryption algorithm.
Description
technical field [0001] The present invention relates to information security technology, in particular to a method and device for image encryption, a method and device for image decryption, and a system for image encryption and decryption. Background technique [0002] In recent years, with the development of wireless technology, the real-time wireless network transmission of images has become more and more popular, and the security issues in it have also been paid more and more attention. Therefore, it is necessary to encrypt the images transmitted wirelessly. A video is a special kind of image, a sequence of images. At present, the image data can be encrypted at the source end that sends the image, the encrypted image data is transmitted through a wireless channel, and then the sink end that receives the image decrypts the received image data, as shown in Figure 1A; The wireless channel for image data encrypts and decrypts the image data, that is, the wireless channel for...
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Login to View More IPC IPC(8): H04N7/167H04N7/16
Inventor 邱嵩汪源谌安军
Owner WUXI ZGMICRO ELECTRONICS CO LTD