A Nonlinear Feedback Shift Register

A nonlinear feedback, shift register technology, applied in the field of information processing, can solve the problem that nonlinear shift registers cannot be widely used in different cryptographic algorithms

Active Publication Date: 2017-03-15
THE PLA INFORMATION ENG UNIV
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  • Abstract
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Problems solved by technology

[0003] In view of this, the embodiment of the present invention provides a nonlinear feedback shift register, which aims to solve the problem that the existing nonlinear shift register cannot be widely applied to different cryptographic algorithms

Method used

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  • A Nonlinear Feedback Shift Register
  • A Nonlinear Feedback Shift Register
  • A Nonlinear Feedback Shift Register

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Embodiment Construction

[0037] The embodiment of the present invention discloses a nonlinear feedback shift register, the core invention of which is that, based on the principle that nonlinear feedback functions can be decomposed into expressions composed of logical AND and logical exclusive OR, the nonlinear feedback shift register The data distribution network configures the state data according to the logical operation function composed of logical AND operation and logical XOR operation converted by the nonlinear feedback function, and the computing network performs logical AND and logical XOR operations on the configured state data, so that The non-linear feedback shift register is not subject to different constraints of the non-linear feedback function, so that it can be applied to different non-linear feedback functions.

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in th...

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Abstract

An embodiment of the invention provides a non-linear feedback shift register. A data distributing network selects variables from state values according to a logical operation function and outputs the variables; a calculating network performs logical conjunction operation and exclusive disjunction operation on the variables inputted by the data distributing network; non-linear feedback functions of a cryptographic algorithm can be converted into functions which only comprises logical conjunction and exclusive disjunction, the logical operation function for the data distributing network of the non-linear feedback shift register in an embodiment consists of logical conjunction operation and exclusive disjunction operation, and calculation carried out by the calculating network also consists of logical conjunction operation and exclusive disjunction operation, so that data can be selected and calculated according to different non-linear feedback functions. The non-linear feedback shift register is widely suitable for different cryptographic algorithms.

Description

technical field [0001] The invention relates to the field of information processing, in particular to a nonlinear feedback shift register. Background technique [0002] The nonlinear feedback shift register is the core component of the sequence cipher algorithm, which is used to generate random sequences. The nonlinear feedback shift register is mainly composed of a shift register and a nonlinear feedback function operation unit. Since the feedback functions used by different nonlinear feedback shift registers are very different, and the use of different cryptographic algorithms to construct random sequences requires different feedback functions, therefore, the existing nonlinear feedback shift registers are usually not widely applicable to different cryptographic algorithm. Contents of the invention [0003] In view of this, an embodiment of the present invention provides a nonlinear feedback shift register, aiming at solving the problem that the existing nonlinear shif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/58H04L9/06
Inventor 戴紫彬李伟南龙梅章轶陈韬刘建国张立朝徐劲松徐进辉
Owner THE PLA INFORMATION ENG UNIV
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