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Improvement Majority Function in A5/1 stream cipher Algorithm | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 34, 1B, 2016, Pages 16-25 PDF (788.72 K) | ||
| DOI: 10.30684/etj.34.1B.2 | ||
| Authors | ||
| Hala Bahjat; Mohanad Ali | ||
| Abstract | ||
| Security is an important issue, especially in today’s technologically advanced society. Global System for Mobile Communications (GSM) is a world-wide standard for digital wireless communication. GSM uses A5/1 stream cipher in order to provide privacy on air communication. This paper introduce new improvements to the A5/1 stream cipher in order overcome the weakness that appear in clocking mechanism that used in A5/1 stream cipher. New S-box generation is proposed to increase the efficient for A5/1 majority function and improve randomness features. The randomness results confirm that the output bit-stream generated by the proposed stream cipher has improved the randomness performance. | ||
| Keywords | ||
| GSM; stream cipher; LFSR; box; and randomness | ||
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