EP 0329966 B1 19950920 - Method for securing secret code data stored in a data memory, and circuitry for carrying out this method.
Title (en)
Method for securing secret code data stored in a data memory, and circuitry for carrying out this method.
Title (de)
Verfahren zum Sichern von in einem Datenspeicher abgelegten geheimen Codedaten und Schaltungsanordnung zur Durchführung des Verfahrens.
Title (fr)
Méthode de protection de données de code secrètes, stockées dans une mémoire de données et agencement de circuit pour la mise en oeuvre de cette méthode.
Publication
Application
Priority
DE 3805977 A 19880225
Abstract (en)
[origin: EP0329966A1] The invention relates to a method and circuitry for securing code data stored in a code data memory (1a) prior to analysis, in which the signals at the code data memory outputs provide an indication of the contents of the code data memory. According to the invention, a blocking circuit (4), controlled by a blocking logic circuit (9), is provided at the code data memory outputs, which it blocks as soon as entered control data fails to match the code data. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
G07F 7/1008 (2013.01); G07F 7/1025 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0329966 A1 19890830; EP 0329966 B1 19950920; AT E128258 T1 19951015; DE 58909440 D1 19951026; DK 169883 B1 19950320; DK 728088 A 19890826; DK 728088 D0 19881229; ES 2077566 T3 19951201; FI 100068 B 19970915; FI 890900 A0 19890224; FI 890900 A 19890826
DOCDB simple family (application)
EP 89101292 A 19890125; AT 89101292 T 19890125; DE 58909440 T 19890125; DK 728088 A 19881229; ES 89101292 T 19890125; FI 890900 A 19890224