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1. (WO2019039381) SECURE COMPUTATION DEVICE, SECURE COMPUTATION METHOD, PROGRAM, AND RECORDING MEDIUM
Latest bibliographic data on file with the International BureauSubmit observation

Pub. No.: WO/2019/039381 International Application No.: PCT/JP2018/030440
Publication Date: 28.02.2019 International Filing Date: 16.08.2018
IPC:
G09C 1/00 (2006.01)
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
C
CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
1
Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
Applicants:
日本電信電話株式会社 NIPPON TELEGRAPH AND TELEPHONE CORPORATION [JP/JP]; 東京都千代田区大手町一丁目5番1号 5-1, Otemachi 1-chome, Chiyoda-ku, Tokyo 1008116, JP
Inventors:
五十嵐 大 IKARASHI, Dai; JP
菊池 亮 KIKUCHI, Ryo; JP
Agent:
中尾 直樹 NAKAO, Naoki; JP
中村 幸雄 NAKAMURA, Yukio; JP
義村 宗洋 YOSHIMURA, Takahiro; JP
Priority Data:
2017-15934422.08.2017JP
Title (EN) SECURE COMPUTATION DEVICE, SECURE COMPUTATION METHOD, PROGRAM, AND RECORDING MEDIUM
(FR) DISPOSITIF DE CALCUL SÉCURISÉ, PROCÉDÉ DE CALCUL SÉCURISÉ, PROGRAMME ET SUPPORT D'ENREGISTREMENT
(JA) 秘密計算装置、秘密計算方法、プログラム、および記録媒体
Abstract:
(EN) A secure computation device acquires secret information {M(i0, …, iS-1)} for a table M(i0, …, iS-1) that has a value of one variable function as an element, where M(ib,0 …, ib,S-1) acquired by plugging a counter value ib,0, …, ib,S-1 in the table M(i0, …, iS-1) is a matrix Mb,γ,μ that is either Mb,2,1 …, or Mb,3,2. The secure computation device uses secret information {ib,0}, …, {ib,S-1} and secret information {M(i0, …, iS-1)} to acquire secret information {Mb,γ,μ} via a secure computation, and acquires the secret information {Mb,Γ,MU} of a matrix Mb,Γ,MU which is acquired by executing remaining processes including processes (to be) executed after a process Pγ,μ among processes Pj,1, Pj,2, Pj,3, and Pj,4.
(FR) Selon l’invention, un dispositif de calcul sécurisé acquiert des informations secrètes {M(i0, …, iS-1)} pour une table M(i0, …, iS-1) qui comprend une valeur d’une fonction variable en étant qu’élément, M(ib,0 …, ib,S-1) acquis en ajoutant une valeur de compteur ib,0, …, ib,S-1 dans la table M(i0, …, iS-1) étant une matrice Mb, γ , μ qui est soit Mb,2,1 …, soit Mb,3,2. Le dispositif de calcul sécurisé utilise des informations secrètes {ib,0}, …, {ib,S-1} et des informations secrètes {M(i0, …, iS-1)} pour acquérir des informations secrètes {Mb, γ , μ} au moyen d’un calcul sécurisé, et acquiert les informations secrètes {Mb, Γ , MU} d’une matrice Mb, Γ , MU qui sont acquises en exécutant les processus restants comprenant les processus (devant être) exécutés après un processus Pγ , μ parmi les processus Pj,1, Pj,2, Pj,3, et Pj,4.
(JA) 秘密計算装置は、一変数関数値を要素に持つ表M(i,…,iS-1)の秘匿情報{M(i,…,iS-1)}を得る。ただし、表M(i,…,iS-1)にカウンタ値ib,0,…,ib,S-1を代入したM(ib,0,…,ib,S-1)がMb,2,1,…,Mb,3,2の何れかである行列Mb,γ,μである。秘密計算装置は、秘匿情報{ib,0},…,{ib,S-1}および秘匿情報{M(i,…,iS-1)}を用い、秘密計算によって、秘匿情報{Mb,γ,μ}を得、処理Pj,1、処理Pj,2、処理Pj,3、および処理Pj,4のうち、処理Pγ,μよりも後に行われる各処理を含む残存処理を実行して得られる行列Mb,Γ,MUの秘匿情報{Mb,Γ,MU}を得る。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)