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Measurement-matrix-controlled image compressive sensing and image encryption method

An encryption method and compressed sensing technology, applied in the field of information security, can solve problems such as difficult allocation, storage and memory, and large consumption of keys to achieve high security, expand key space, and enhance system security.

Inactive Publication Date: 2012-12-19
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing image encryption algorithms based on compressed sensing basically use the measurement matrix itself as the encryption key, which consumes too much key and is not easy to distribute, save and remember

Method used

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  • Measurement-matrix-controlled image compressive sensing and image encryption method
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  • Measurement-matrix-controlled image compressive sensing and image encryption method

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Embodiment Construction

[0027] specific implementation plan

[0028] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited thereby.

[0029] Example. Image encryption scheme for compressive sensing based on chaotic system control measurement matrix.

[0030] This implementation scheme is based on a chaotic system, and the encryption process integrates the principle of compressed sensing. The encryption and decryption process can be expressed as follows:

[0031] Encryption process: (1-1)

[0032] Decryption process: (1-2)

[0033] where represents the representation of the input plaintext in the sparse basis, represents the measurement matrix, represents the secondary encryption matrix, represents the encrypted ciphertext, and represents the measurement result. Using the measurement results, combined wi...

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Abstract

A measurement-matrix-controlled image compressive sensing and image encryption method includes: applying compressive sensing to image encryption, using a cyclic matrix to construct a measurement matrix and then constructing an initial vector of the cyclic matrix through a chaotic system, so that the measurement matrix is subjected to key control; and taking an initial value of the chaotic system as a key according to sensibility of the chaotic system to the initial value. By the method, image compression and image encryption are completed simultaneously, and high safety is achieved.

Description

technical field [0001] The patent of the present invention belongs to the field of information security technology, in particular to image encryption technology. Background technique [0002] With the development of digital products and the Internet, people are increasingly dependent on network systems and network information resources, making network information security issues increasingly prominent. Therefore, information security technology has also attracted much attention, among which encryption technology is the core of information security. As a kind of information carrier, image is widely used in various fields due to its vivid characteristics. In some special applications, image information, as confidential information, needs to be encrypted for network transmission to prevent leakage of sensitive information. Because image information is different from general text information, it has the characteristics of large data volume, wide frequency band occupation, large...

Claims

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Application Information

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IPC IPC(8): H04N5/913G06T1/00
Inventor 周南润张艾迪吴建华张烨
Owner NANCHANG UNIV
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