EP 1125260 A1 20010822 - SECURE MEMORY EXPANSION OF AN IC PORTABLE DEVICE
Title (en)
SECURE MEMORY EXPANSION OF AN IC PORTABLE DEVICE
Title (de)
GESICHERTE SPEICHERERWEITERUNG EINER CHIPKARTE
Title (fr)
EXTENSION SECURISEE DE LA MEMOIRE D'UN DISPOSITIF PORTATIF A CIRCUIT INTEGRE
Publication
Application
Priority
- CA 9901011 W 19991029
- CA 2250499 A 19981030
Abstract (en)
[origin: WO0026866A1] The method is for securely expanding a storage capacity of an IC portable device's memory. For a given data object stored or to be stored in the memory of the IC portable device, a unique master certificate, used as a descriptor of the data object, is generated randomly. The master certificate is indexed in the memory of the portable device. A secondary certificate is derived from and is determinable only using the master certificate. The data object is stored with the secondary certificate on a data storage medium external to the portable device. The memory of the smart card is thus freed from the data object and only the IC portable device has key information to retrieve the data object stored on the data storage medium.
IPC 1-7
IPC 8 full level
G06F 21/00 (2006.01); G07F 7/10 (2006.01); G06F 1/00 (2006.01)
CPC (source: EP)
G06F 21/79 (2013.01); G06Q 20/229 (2020.05); G06Q 20/341 (2013.01); G06Q 20/346 (2013.01); G06Q 20/3552 (2013.01); G06Q 20/3576 (2013.01); G07F 7/1008 (2013.01)
Citation (search report)
See references of WO 0026866A1
Designated contracting state (EPC)
CH DE FR IT LI
DOCDB simple family (publication)
WO 0026866 A1 20000511; AU 6457299 A 20000522; EP 1125260 A1 20010822
DOCDB simple family (application)
CA 9901011 W 19991029; AU 6457299 A 19991029; EP 99952202 A 19991029