Paper 2014/704
A 128-bit Block Cipher Based on Three Group Arithmetics
Shenghui Su and Shuwang Lü and Daqiang Dong
Abstract
Enlightened by the IDEA block cipher, the authors put forward the REESSE3+ block cipher (a symmetric key cryptosystem) based on three group arithmetics: addition modulo 2 (bit XOR), addition modulo 2 ^ 16, and multiplication modulo 2 ^ 16 + 1. Different from IDEA, REESSE3+ uses 128-bit block inputs, a 256-bit key, and a renovative round function. The authors describe the REESSE3+ cipher algorithm in the graph, and expound the encryption subkeys, encryption operation, decryption subkeys, and decryption operation. Further, demonstrate the correctness of the REESSE3+ cipher algorithm, and analyze the security of REESSE3+ from three aspects. The measures for assuring the security of REESSE3+ cover those for assuring the security of IDEA, and thus, the ability of REESSE3+ in resisting differential analysis is at least equivalent to that of IDEA.
Note: The content has no essential change.
Metadata
- Available format(s)
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- Block cipher algorithmSymmetric keyRound functionAdditive groupMultiplicative group
- Contact author(s)
- reesse @ 126 com
- History
- 2017-04-30: last of 4 revisions
- 2014-09-09: received
- See all versions
- Short URL
- https://ia.cr/2014/704
- License
-
CC BY