scispace - formally typeset
Search or ask a question
Author

시라이 다이조

Bio: 시라이 다이조 is an academic researcher. The author has contributed to research in topics: Encryption & MDS matrix. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Papers
More filters
Patent
08 Dec 2011
TL;DR: In this paper, the authors proposed a high-security cryptographic processing apparatus that increases difficulty in analyzing the key of a common-key-block cipher, and a method therefor, to realize cryptographic processing whereby resistance to linear cryptanalysis attacks in the Common-Key-Block cipher is improved.
Abstract: The invention realizes a high-security cryptographic processing apparatus that increases difficulty in analyzing its key and a method therefor. In Feistel-type common-key-block cryptographic processing that repeatedly executes an SPN-type F-function having the nonlinear conversion section and the linear conversion section over a plurality of rounds, Linear conversion processing of an F-function corresponding to each of the plurality of rounds is carried out by linear conversion processing that applies square MDS (Maximum Distance Separable) matrices. The invention uses a setting that arbitrary m column vectors included in inverse matrices of square MDS matrices being set up at least in consecutive even-numbered rounds and in consecutive odd-numbered rounds, respectively, constitute a square MDS matrix. This structure realizes cryptographic processing whereby resistance to linear cryptanalysis attacks in the common-key-block cipher is improved.

1 citations


Cited by
More filters
Patent
08 Apr 2019
TL;DR: In this paper, the authors proposed an effective ultra-light block cryptosystem for pervasive computing comprising: a substitution-box (S-box) to prevent backdoor ideas from being used in encryption algorithms, a permutation-box that uses a keydependent one-stage omega network designed to not only meet strict avalanche criterion but also make cipher decryption more difficult.
Abstract: The present invention relates to an effective ultra-light block cryptosystem for pervasive computing comprising: a substitution-box (S-box) to prevent backdoor ideas from being used in encryption algorithms; a permutation-box (P-box) that uses a key-dependent one-stage omega network designed to not only meet strict avalanche criterion but also make cipher decryption more difficult; and a Feistel structure that enables one core to be executed during encryption and decryption. Accordingly, the present invention provides ultra-light block cryptography that is well-suited for pervasive computing that requires a high throughput encryption algorithm with a small hardware area.

2 citations