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Encryption and decryption method based on self-synchronizing chaotic stream ciphers of 1D-ICMIC (One Dimensional-Iterative Chaotic Maps with Infinite Collapses)

An encryption method and stream cipher technology, applied in the field of encryption and decryption of self-synchronized chaotic stream ciphers, can solve problems such as insufficient, and achieve the effect of strong security

Inactive Publication Date: 2012-08-08
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the one-dimensional infinitely folded chaotic map (1D-ICMIC) has complex dynamics and ideal uniform distribution properties, it only has one parameter, which may not be enough for practical use

Method used

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  • Encryption and decryption method based on self-synchronizing chaotic stream ciphers of 1D-ICMIC (One Dimensional-Iterative Chaotic Maps with Infinite Collapses)
  • Encryption and decryption method based on self-synchronizing chaotic stream ciphers of 1D-ICMIC (One Dimensional-Iterative Chaotic Maps with Infinite Collapses)
  • Encryption and decryption method based on self-synchronizing chaotic stream ciphers of 1D-ICMIC (One Dimensional-Iterative Chaotic Maps with Infinite Collapses)

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Embodiment Construction

[0018] The present invention provides a kind of encryption method based on 1D-ICMIC self-synchronized chaotic flow cipher, and this method comprises the following steps:

[0019] 1) The encryption end uses 1D-ICMIC's self-synchronized chaotic stream cipher to generate the key stream sequence K n+1 ;

[0020] 2) Using the key stream sequence K n+1 For the plaintext sequence M n+1 After encryption, take the mod value and generate the ciphertext sequence C n+1 ,in:

[0021] c n+1 =mod(m n+1 +k n+1 ,1).

[0022] A decryption method based on 1D-ICMIC self-synchronized chaotic stream cipher, the decryption method based on 1D-ICMIC self-synchronized chaotic stream cipher comprises the following steps:

[0023] 1) The decryption terminal uses the self-synchronized chaotic stream cipher of 1D-ICMIC to generate the decryption key sequence K’ n+1 ;

[0024] 2) For the ciphertext sequence C n+1 Using the decryption key sequence K' n+1 Decrypt and restore the plaintext sequence...

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Abstract

The invention relates to an encryption and decryption method based on self-synchronizing chaotic stream ciphers of 1D-ICMIC (One Dimensional-Iterative Chaotic Maps with Infinite Collapses). The encryption and decryption method comprises the following steps: (1) generating a key stream sequence Kn+1 by using the self-synchronizing chaotic stream ciphers of the 1D-ICMIC through an encryption terminal; and (2) encrypting a clear text sequence Mn+1 by using the key stream sequence Kn+1 and then obtaining a mod value, and generating a ciphertext sequence Cn+1, wherein cn+1=mod (mn+1+kn+1, 1). The invention provides the simple, efficient and safe encryption and decryption method for encryption functions based on the self-synchronizing chaotic stream ciphers of the 1D-ICMIC according to the composite mapping formed by one-dimensional piecewise linear mapping (ID-PLM) and the 1D-ICMIC.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a 1D-ICMIC-based encryption and decryption method of a self-synchronizing chaotic stream cipher for data encryption. Background technique [0002] With the rapid development of communication technology and Internet, the issue of information security has increasingly become the focus of social attention, which greatly promotes the research of new secure communication technology. The discovery of chaos and its excellent cryptographic properties provide new ideas, perspectives and methods for cryptography and communication security. In chaotic phenomena, as long as the initial conditions are slightly different, the results will be very different and difficult to predict. However, in some cases, the mathematical model reflecting this kind of phenomenon is very simple, and even a one-dimensional nonlinear iterative function can show this. a chaotic characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/28
Inventor 邱跃洪何晨
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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