| Presentation | 2002/5/15 S-Box and Bit Sliced Analysis on DES(III) : Cipher-Only Information-Theoretic Strength of Keys Tohru KOHDA, Atsushi SHIMONOSONO, Takanobu TERAZONO, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We introduce a cryptanalytic divide-and-conquer technique,referred to as a S-Box-and-Bit-Sliced Approach on an iterative block cipher such as DES. We first describe a set of input-output interconnection (IOIC) circuits in bit-slicing level for every S-box, and then demonstrate a set of 48 pairs of the input random vector and its output random variable to be observed simultaneously to guess defferent keys. We call such a pair with information-theoretic costs a key-trellis module. Secondly, using a probabilisitic model of 2-round characteristic of S-box based on a Boolean algebra with ket vector to be defined here, we get a set of all sensitive keys in terms of Kullback-Leibler (or briefly, KL) distances and show that among 48 keys, 41 keys are information-theoretically sensitive |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | partitioning cryptanalysis / ciphertext-only analysis / S-Box and Bit Slicing / Boolean algebra with ket vector / Kullback-Leibler distance / DES. |
| Paper # | ISEC2002-3 |
| Date of Issue |
| Conference Information | |
| Committee | ISEC |
|---|---|
| Conference Date | 2002/5/15(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Information Security (ISEC) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | S-Box and Bit Sliced Analysis on DES(III) : Cipher-Only Information-Theoretic Strength of Keys |
| Sub Title (in English) | |
| Keyword(1) | partitioning cryptanalysis |
| Keyword(2) | ciphertext-only analysis |
| Keyword(3) | S-Box and Bit Slicing |
| Keyword(4) | Boolean algebra with ket vector |
| Keyword(5) | Kullback-Leibler distance |
| Keyword(6) | DES. |
| 1st Author's Name | Tohru KOHDA |
| 1st Author's Affiliation | Department of Computer Science and Communication Engineering,Kyushu University() |
| 2nd Author's Name | Atsushi SHIMONOSONO |
| 2nd Author's Affiliation | Department of Computer Science and Communication Engineering,Kyushu University |
| 3rd Author's Name | Takanobu TERAZONO |
| 3rd Author's Affiliation | Department of Computer Science and Communication Engineering,Kyushu University |
| Date | 2002/5/15 |
| Paper # | ISEC2002-3 |
| Volume (vol) | vol.102 |
| Number (no) | 71 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |