| Presentation | 2009-11-13 State Recovery of RC4 PRGA by Using Nonzero Bit Differences Mitsuki AJIRO, Atsuko MIYAJI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we focus on a keystream of RC4 PRGA. The analysis of the transitions of two permutations, S and S', with some differences in the initial round were argued in [17] [18] [11]. Recently the existence of colliding keys was shown theoretically in [7] even if a secret key length is short. In addition, the existence of pairs of the secret key that generate two permutations, S and S', with two bytes differences in the initial round was shown theoretically. In this paper, we investigate how the structure mixes the permutation S by observing correlation between two keystream Z and Z' which are generated by two permutations, S and S', with some differences in the initial round. We show that we can suppose the part of the initial permutation with the probability that is higher than the random. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | RC4 / Internal State Analysis / Stream Cipher / Symmetric Cipher |
| Paper # | ISEC2009-65,LOIS2009-54 |
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| Conference Information | |
| Committee | LOIS |
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| Conference Date | 2009/11/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Life Intelligence and Office Information Systems (LOIS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | State Recovery of RC4 PRGA by Using Nonzero Bit Differences |
| Sub Title (in English) | |
| Keyword(1) | RC4 |
| Keyword(2) | Internal State Analysis |
| Keyword(3) | Stream Cipher |
| Keyword(4) | Symmetric Cipher |
| 1st Author's Name | Mitsuki AJIRO |
| 1st Author's Affiliation | Japan Advanced Institute of Science and Technology() |
| 2nd Author's Name | Atsuko MIYAJI |
| 2nd Author's Affiliation | Japan Advanced Institute of Science and Technology |
| Date | 2009-11-13 |
| Paper # | ISEC2009-65,LOIS2009-54 |
| Volume (vol) | vol.109 |
| Number (no) | 272 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |