Cryptographic mersenne twister and fubuki stream/block cipher

• 資料種別: 文書・図像類
• タイトル: Cryptographic mersenne twister and fubuki stream/block cipher
• 著者・編者: Matsumoto, Makoto; Nishimura, Takuji; Hagita, Mariko; Saito, Mutsuo
• 著者標目: Matsumoto, Makoto; Nishimura, Takuji; Hagita, Mariko; Saito, Mutsuo
• 本文の言語コード: eng
• 件名標目: Mersenne Twister; non-secure random number generator; stream cipher; CryptMT; Fubuki; AES
• NDC: 410
• 対象利用者: 一般
• 一般注記: type:text; We propose two stream ciphers based on a non-secure pseudorandom number generator (called the mother generator). The mother generator is here chosen to be the Mersenne Twister (MT), a widely used 32-bit integer generator having 19937 bits of internal state and period 2[19937]-1. One proposal is CryptMT, which computes the accumulative product of the output of MT, and use the most significant 8 bits as a secure random numbers. Its period is proved to be 2[19937] -1, and it is 1.5-2.0 times faster than the most optimized AES in counter-mode. The other proposal, named Fubuki, is designed to be usable also as a block cipher. It prepares nine different kinds of encryption functions (bijections from blocks to blocks), each of which takes a parameter. Fubuki encrypts a sequence of blocks(=a plain message) by applying these encryption functions iteratedly to each of the blocks. Both the combination of the functions and their parameters are pseudorandomly chosen by using its mother generator MT. The key and the initial value are passed to the initialization scheme of MT.
• 記録形式（IMT）: application/pdf
• 一次資料へのリンクURL: http://ir.lib.hiroshima-u.ac.jp/files/public/1/15039/20141016122640690255/Cryptographic.pdf
• オンライン閲覧公開範囲: 限定公開
• 連携機関・データベース: 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• 提供元機関・データベース: 広島大学 : 広島大学学術情報リポジトリ