EP 1423937 A2 20040602 - Method for making secure a secret quantity
Title (en)
Method for making secure a secret quantity
Title (de)
Verfahren zur Absicherung einer Geheimzahl
Title (fr)
Procédé de sécurisation d'une quantité secrete
Publication
Application
Priority
- FR 0203007 W 20020904
- FR 0111430 A 20010904
Abstract (en)
[origin: FR2829331A1] A chip card key security system compares (18) a stored (14) intermediate result after X iterations and a random delay with the inverse result from the rest of the N iteration sequence and only confirms the encryption if the results are compatible.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
H04L 9/004 (2013.01 - EP US); H04L 9/0625 (2013.01 - EP US); G06F 2207/7219 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
FR 2829331 A1 20030307; FR 2829331 B1 20040910; EP 1423937 A2 20040602; JP 2005503069 A 20050127; US 2005021990 A1 20050127; WO 03024017 A2 20030320; WO 03024017 A3 20031127
DOCDB simple family (application)
FR 0111430 A 20010904; EP 02785487 A 20020904; FR 0203007 W 20020904; JP 2003527939 A 20020904; US 48863004 A 20040803