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1. WO2007138518 - METHOD FOR CRYPTOGRAPHIC AUTHENTICATION

Publication Number WO/2007/138518
Publication Date 06.12.2007
International Application No. PCT/IB2007/051877
International Filing Date 16.05.2007
IPC
G06F 21/34 2013.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
30Authentication, i.e. establishing the identity or authorisation of security principals
31User authentication
34involving the use of external additional devices, e.g. dongles or smart cards
CPC
G06F 21/34
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
21Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
30Authentication, i.e. establishing the identity or authorisation of security principals
31User authentication
34involving the use of external additional devices, e.g. dongles or smart cards
G06F 2221/2103
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
2221Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
21Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
2103Challenge-response
Applicants
  • NXP B.V. (AllExceptUS)
  • NOWOTTNICK, Juergen [DE]/[DE] (UsOnly)
  • BOEH, Frank [DE]/[DE] (UsOnly)
Inventors
  • NOWOTTNICK, Juergen
  • BOEH, Frank
Agents
  • RÖGGLA, Harald
Priority Data
06114665.030.05.2006EP
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) VERFAHREN ZU KRYPTOGRAPHISCHEN AUTHENTIKATION
(EN) METHOD FOR CRYPTOGRAPHIC AUTHENTICATION
(FR) PROCÉDÉ D'AUTHENTIFICATION CRYPTOGRAPHIQUE
Abstract
(DE)
Die Erfindung betrifft ein Verfahren zur kryptographischen Authentifikation in Zugangs- sicherungssystemen. Um eine Softwareldeltasung bereitzustellen, schlagt die Erfindung vor, dass in den Verfahren zur gesicherten Speicherung von Zahlerstanden in einem nicht flEchtigen Speicher (EEPROM) (10) eine Inkrementierung (11) erfolgt und nach jeder Inkrementierung (11) der aktuelle Zählerstand in nur einem EEPROM - Segment aktualisiert wird, wobei ein nachfolgender Zugriff auf den EEPROM (10) nur bei einer erfolgreichen Inkrementierung (11) eines EEPROM basieren Zahlers erfolgt.
(EN)
The invention relates to a method for cryptographic authentication in access security systems. The aim of the invention is to provide a software solution. To this end, the method for secured storage of counter states in a non-volatile memory (EEPROM) (10) involves an incrementing (11) process, and the current counter state is updated in only one EEPROM segment following each incrementing process (11), a subsequent access to the EEPROM (10) only being enabled in the event of a successful incrementing (11) of an EEPROM-based counter.
(FR)
L'invention concerne un procédé d'authentification cryptographique de systèmes d'accès sécurisé. L'objectif de cette invention est de créer une solution logicielle. A cet effet, le procédé pour stocker de manière sécurisée des positions de compteur dans une mémoire non volatile (EEPROM) (10) comprend une étape d'incrémentation (11), et consiste à actualiser la position courante du compteur uniquement dans un segment de cette mémoire après chaque incrémentation (11), un accès ultérieur à ladite mémoire EEPROM (10) ayant lieu uniquement en cas d'incrémentation (11) réussie d'un compteur fondé sur une EEPROM.
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