A recoverable lightweight desensitization method for reserved digital types

A digital and lightweight technology, applied in the field of information security, can solve the problems of high cost, achieve high security, save software and hardware overhead resources, and achieve the effect of safe desensitization

Active Publication Date: 2018-12-18
GUIZHOU UNIV
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  • Abstract
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: to solve the difficult problems existing in the existing recoverable data desensitization technology: (1) the existing recoverable data desensitization technology adopts traditional block cipher encryption, so that the data length and type change, Therefore, it is necessary to modify the database structure or application program to adapt to these changes, which is very costly

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  • A recoverable lightweight desensitization method for reserved digital types
  • A recoverable lightweight desensitization method for reserved digital types
  • A recoverable lightweight desensitization method for reserved digital types

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] In 2007, the PRESENT lightweight block cipher algorithm was proposed at the International Conference on Encryption Hardware and Embedded Systems, and this cipher algorithm also became the IOS-29192 standard. Among the lightweight block ciphers, the presentation of the PRESENT cipher is a milestone work. The low-resource and high-efficiency design highlights of this cryptographic algorithm have been imitated and adopted by many other lightweight block cipher algorithms. Among them, the algorithm S-box has good cryptographic characteristics, and many algorithms such as GOSTrevisted, LED, QTL and PHOTON have been adopted. The S-box is used; while the linear diffusion component of the algorithm has only the P permutation operation.

[0019] The block length of the PRESENT cipher is 64 bits, and the key length is set to 80 bits and 128 bits. The encr...

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Abstract

The invention discloses a recoverable lightweight desensitization method of reserved digital type. The method uses 10 integers from 0 to 9, encrypts by lightweight block cipher algorithm to obtain ciphertext size distribution sequence, and takes the distribution sequence as digital type forward permutation table. The real digital data to be desensitized is added one by one with the encryption key,the 10 modulo operation is operated, and then the digital forward replacement table is replaced to desensitize, and the digital false data is obtained after desensitization, and the desensitizationof the data is completed. On the basis of the digital forward permutation table, a digital inverse permutation table is constructed. The desensitized pseudo-digital data is permuted and recovered, andthen subtracted one by one with the encryption key, and the 10 modulo operation is operated, so that the desensitized pseudo-data is recovered to obtain the real digital data. The method can keep the data format before desensitization and the data format after desensitization unchanged, realize data concealment, and carry out efficient and safe desensitization treatment and desensitization recovery for digital data of any length, thus saving the overhead of software realization and the cost of hardware realization.

Description

technical field [0001] The invention relates to a recoverable lightweight desensitization method for reserved digital types, which belongs to the field of information security. Background technique [0002] Data desensitization refers to the special processing of secret or private information contained in data, such as personal identification information, commercial confidential data, etc., in order to achieve the effect of data deformation, so that malicious attackers cannot extract information from desensitized data. Directly obtain sensitive or valuable information, so as to realize the protection of confidential and private information. [0003] According to the effect of data desensitization, it can be divided into two categories: non-recoverable desensitization and recoverable desensitization. Irrecoverable desensitization means that the desensitized data cannot be recovered, such as obfuscation and masking. Restorable desensitization means that desensitized data can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06
CPCH04L9/0631
Inventor 刘波涛彭长根吴睿雪谢明明丁红发袁文书夏宗涛杨炳钊
Owner GUIZHOU UNIV
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