Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 14, Issue 7, Pages 3089-3099Publisher
ELSEVIER
DOI: 10.1016/j.cnsns.2008.12.005
Keywords
Block cipher; Chaos-based cryptosystem; S-boxes; Tent map
Categories
Funding
- CityU [7002216]
- National Natural Science Foundation of China [60573047, 60703035]
- Foundation of Chongqing Education Committee [KJ070503]
- Natural Science Foundation of CQ CSTC [2008BB2193]
- Chongqing University of Posts and Telecommunications [A200726]
Ask authors/readers for more resources
In this paper, a block encryption scheme based on dynamic substitution boxes (S-boxes) is proposed. Firstly, the difference trait of the tent map is analyzed. Then. a method for generating S-boxes based on iterating the tent map is presented. The plaintexts are divided into blocks and encrypted with different S-boxes. The cipher blocks are obtained by 32 rounds of substitution and left cyclic shift. To improve the security of the cryptosystem, a cipher feedback is used to change the state value of the tent map, which makes the S-boxes relate to the plaintext and enhances the confusion and diffusion properties of the cryptosystem. Since dynamic S-boxes are used in the encryption, the cryptosystem does not suffer from the problem of fixed structure block ciphers. Theoretical and experimental results indicate that the cryptosystem has high security and is suitable for secure communications. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available