Randomness analysis-based data encryption function detection method

A technology of data encryption and verification method, applied in the field of cryptographic security in information security, to achieve the effect of high accuracy, convenience and accuracy, and simple numerical value

Inactive Publication Date: 2012-11-14
BEIJING UNIV OF POSTS & TELECOMM
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  • Claims
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Problems solved by technology

However, in the actual application process, the following questions may often be encountered: Is this piece of data encrypted? This question seems simple, but so far there is no mature and reliable method to judge

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  • Randomness analysis-based data encryption function detection method
  • Randomness analysis-based data encryption function detection method
  • Randomness analysis-based data encryption function detection method

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Embodiment Construction

[0050] 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.

[0051] As we all know, in the randomness detection, the hypothesis testing method is usually used; that is, it is assumed that the data sequence to be tested is random, and according to a certain statistical method, the statistical value of the random sequence should conform to a specific distribution. Then, calculate the statistical value of the data sequence, and judge whether the sequence to be detected is random according to the probability of whether the statistical value conforms to a specific distribution. The present invention is also based on this hypothesis testing method.

[0052] The basic idea of ​​hypothesis testing is: first put forward a hypothesis about the overall nature, which is called the null hypothesis, and then derive the co...

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Abstract

The invention discloses a randomness analysis-based data encryption function detection method, which comprises the following steps of: (1) generating a detection sequence: dividing a data sequence to be detected into a plurality of data subsequences to be detected according to the set conditions; (2) executing randomness detection: aiming at each item in 16 items of 8 classes of a randomness testmethod, and respectively performing randomness detection on the plurality of data subsequences to be detected; and (3) analyzing detection results: in the process of executing all detection items, ifany data subsequence does not pass any item of the randomness detection, judging that the data sequence to be detected is a nonrandom sequence, namely the data to be detected is not encrypted, and ifthe data subsequences pass the detection of all detection items, judging that the data to be detected has been subjected to a certain degree of encryption processing. The randomness analysis-based data encryption function detection method has the advantages that the test method is novel, and test angles are comprehensive and cover a plurality of aspects of the data sequence randomness; and the statistic test principle is adopted for detection, so the operation is simple and convenient and that whether the data is encrypted in an information system can be effectively and accurately judged.

Description

technical field [0001] The invention relates to a technology for testing data encryption functions, more precisely, to a method for testing data encryption functions based on randomness analysis, and belongs to the technical field of password security in information security. Background technique [0002] Nowadays, people often need to take corresponding technical measures to protect their data from being seen or destroyed by some people with bad intentions. In the information age, information can help and benefit groups or individuals; similarly, information can also be used to threaten and cause damage to them. Among highly competitive industrial and commercial enterprises, economic espionage often finds ways to obtain all kinds of intelligence about competitors. Therefore, objectively, there is an urgent need for a strong security measure to protect confidential data from being stolen or tampered with. [0003] At present, a variety of technologies for encrypting data s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L9/06H04L25/03
Inventor 徐国爱张淼马健丽郭承青郭燕慧
Owner BEIJING UNIV OF POSTS & TELECOMM
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