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Open AccessArticle

Dynamic Rounds Chaotic Block Cipher Based on Keyword Abstract Extraction

by Juan Wang 1,2 and Qun Ding 1,*
Electronic Engineering College, Heilongjiang University, Harbin 150001, China
Electronic and Information Engineering College, Heilongjiang University of Science and Technology, Harbin 150027, China
Author to whom correspondence should be addressed.
Entropy 2018, 20(9), 693;
Received: 5 July 2018 / Revised: 28 August 2018 / Accepted: 8 September 2018 / Published: 11 September 2018
(This article belongs to the Special Issue Information Theory Applications in Signal Processing)
According to the keyword abstract extraction function in the Natural Language Processing and Information Retrieval Sharing Platform (NLPIR), the design method of a dynamic rounds chaotic block cipher is presented in this paper, which takes into account both the security and efficiency. The cipher combines chaotic theory with the Feistel structure block cipher, and uses the randomness of chaotic sequence and the nonlinearity of chaotic S-box to dynamically generate encrypted rounds, realizing more numbers of dynamic rounds encryption for the important information marked by NLPIR, while less numbers of dynamic rounds encryption for the non-important information that is not marked. Through linear and differential cryptographic analysis, ciphertext information entropy, “0–1” balance and National Institute of Science and Technology (NIST) tests and the comparison with other traditional and lightweight block ciphers, the results indicate that the dynamic variety of encrypted rounds can achieve different levels of encryption for different information, which can achieve the purpose of enhancing the anti-attack ability and reducing the number of encrypted rounds. Therefore, the dynamic rounds chaotic block cipher can guarantee the security of information transmission and realize the lightweight of the cryptographic algorithm. View Full-Text
Keywords: chaos; block cipher; dynamic encrypted rounds; abstract extraction chaos; block cipher; dynamic encrypted rounds; abstract extraction
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Wang, J.; Ding, Q. Dynamic Rounds Chaotic Block Cipher Based on Keyword Abstract Extraction. Entropy 2018, 20, 693.

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