EP 1639447 A1 20060329 - SECURITY METHOD FOR A CRYPTOGRAPHIC ELECTRONIC ASSEMBLY BASED ON MODULAR EXPONENTIATION AGAINST POWER ATTACKS
Title (en)
SECURITY METHOD FOR A CRYPTOGRAPHIC ELECTRONIC ASSEMBLY BASED ON MODULAR EXPONENTIATION AGAINST POWER ATTACKS
Title (de)
VERFAHREN ZUR SICHERUNG EINER AUF MODULARER POTENZIERUNG BASIERENDEN ELEKTRONISCHEN KRYPTOANLAGE GEGEN ANGRIFFE MITTELS LEISTUNGSANALYSE
Title (fr)
PROCEDE DE SECURISATION D'UN ENSEMBLE ELECTRONIQUE DE CRYPTOGRAPHIE A BASE D'EXPONENTIATION MODULAIRE CONTRE LES ATTAQUES PAR ANALYSE DE PUISSANCE
Publication
Application
Priority
- FR 0002978 W 20001026
- FR 9913507 A 19991028
Abstract (en)
[origin: WO0131436A1] The invention concerns a security method for an electronic assembly implementing a cryptographic computation process using a modular exponentiation of a quantity (<i>x</i>), said modular exponentiation utilising a secret exponent (<i>d</i>). The invention is characterised in that it consists in breaking down said secret exponent into a plurality of <i>k</i> unpredictable values (<i>d</i>1, <i>d</i>2, ..., <i>d</i>k) whereof the sum is equal to said secret exponent.
IPC 1-7
IPC 8 full level
H04L 9/10 (2006.01); G06F 7/72 (2006.01); H04L 9/08 (2006.01)
CPC (source: EP US)
G06F 7/723 (2013.01 - EP US); G06F 2207/7242 (2013.01 - EP US)
Citation (search report)
See references of WO 0131436A1
Citation (examination)
TSUTOMU ET AL: "Speeding Up Secret Computations with Insecure Auxiliary Devices", ADVANCES IN CRYPTOLOGY, PROCEEDINGS OF THE CONFERENCE ON THE THEORY AND APPLICATION OF CRYPTOGRAPHY, 21 August 1998 (1998-08-21) - 25 August 1988 (1988-08-25), Berlin, pages 497 - 506, XP000345652
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0131436 A1 20010503; EP 1639447 A1 20060329; FR 2800478 A1 20010504; FR 2800478 B1 20011130; JP 2003513491 A 20030408; US 6973190 B1 20051206
DOCDB simple family (application)
FR 0002978 W 20001026; EP 00971508 A 20001026; FR 9913507 A 19991028; JP 2001533507 A 20001026; US 86943501 A 20010628