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Type-3 Feistel Network of The 128-bits Block Size Improved Blowfish Cryptographic Encryption | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 27, Issue 2, 2009, Pages 235-246 PDF (287.46 K) | ||
| DOI: 10.30684/etj.27.2.2 | ||
| Author | ||
| Ashwaq T. Hashim | ||
| Abstract | ||
| In this paper, a new secret-key block cipher called 128-bits Blowfish is proposed which is an evolutionary improvement of 64-bits Blowfish designed to meet the requirements of the Advanced Encryption Standard (AES) to increase security and to improve performance. The proposed algorithm will be used a variable key size up to 192 bytes. It is a Type-3 Feistel network iterated simple function 16 times. Specifically, in this proposed algorithm, a combination of four S-boxes lookups, multiplications as well as fixed and data-dependent rotations will be used. Mixing round provide different levels of security, efficiency, flexibility and good avalanche effect. The proposal is word-oriented, in that all the internal operations are performed on 32-bit words. So it is possible to implement the algorithm on smart cards efficiently. | ||
| Keywords | ||
| Blowfish; Cryptography; Feistel Network; Block Cipher; AES | ||
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