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Interweaving technology-based key stream generation method and device

A technology for generating a device and a key stream, applied in the field of keys, can solve problems such as inability to encrypt large data, and a small key stream sequence period, and achieve the effect of good autocorrelation properties

Active Publication Date: 2014-11-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
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Problems solved by technology

[0007] The purpose of the present invention is to provide a key stream generation method and device based on interleaving technology, which aims to solve the problem that the key stream sequence period of the existing encryption device is small and cannot encrypt large data well

Method used

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  • Interweaving technology-based key stream generation method and device
  • Interweaving technology-based key stream generation method and device
  • Interweaving technology-based key stream generation method and device

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] A key stream generation method based on interleaving technology, such as image 3 shown, including the following steps:

[0027] S1, select input sequence s, this input sequence s has interleaving structure s=I(0 K ;a 1 ;a 2 ;...;a T-1 ) and a binary sequence with an ideal autocorrelation distribution, where 0 K Represents an all-zero column of length K, both K and T are non-zero natural numbers, and the binary sequence a j satisfy the condition d(a T-j ) = d(a j ), d(a j ) means sequence a j The balance difference of j satisfies 1≤j≤T-1.

[0028] S2, intercept the left n shift se...

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Abstract

The invention provides an interweaving technology-based key stream generation method and device. A conventional key stream generator is transformed, non-linear combination assemblies are added, and data is output by using a plurality of taps of an original key stream generator to perform organic combination and interweaving, so that the period of a new sequence is increased by 4 times. Through adoption of the method and the device, the period is increased by 4 times under the condition of not increasing the storage space, and meanwhile the good self-correlation property of an original sequence is kept.

Description

technical field [0001] The invention belongs to the technical field of keys, and in particular relates to a method and device for generating key streams based on interleaving technology. Background technique [0002] Cryptography is an ancient and young science. With the development of information society, the role and status of information in social development is becoming more and more important. Everyone's life is inseparable from the generation, storage, processing and transmission of information. Business Due to the development of internet and e-bussiness, the financial field pays more attention to the issue of information security. It is no exaggeration to say that the security of information systems has become a strategic issue affecting social stability and national security. [0003] There are many kinds of existing key stream generation devices, which are basically divided into two categories: [0004] One type is linear, the linear key stream generation device f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 闫统江
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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