EP 3123461 A1 20170201 - MEMORY EFFICIENT SIDE-CHANNEL-PROTECTED MASKING
Title (en)
MEMORY EFFICIENT SIDE-CHANNEL-PROTECTED MASKING
Title (de)
SPEICHEREFFIZIENTE SEITENKANALGESCHÜTZTE MASKIERUNG
Title (fr)
MASQUAGE PROTÉGÉ CONTRE L'ATTAQUE PAR CANAL LATÉRAL ET ÉCONOME EN MÉMOIRE
Publication
Application
Priority
- DE 102014004378 A 20140326
- EP 2015000625 W 20150323
Abstract (en)
[origin: WO2015144305A1] The invention creates a method in a processor for performing a cryptographic calculation. The performance of the calculation involves the application of a basic masking, by means of which intermediate values are used in the calculation as masked intermediate values. The performance of the calculation additionally involves the application of a folding and a secondary masking. The folding involves the calculation of the masked intermediate value using the unmasked intermediate value and at least one secondary intermediate value. The secondary masking involves the calculation, for each intermediate value masked by means of the basic masking, under random control, being performed either with the masked intermediate value or with the one's complement of the masked intermediate value.
IPC 8 full level
G09C 1/00 (2006.01); H04L 9/00 (2006.01); H04L 9/06 (2006.01)
CPC (source: EP)
G09C 1/00 (2013.01); H04L 9/003 (2013.01); H04L 9/0631 (2013.01); H04L 2209/043 (2013.01); H04L 2209/122 (2013.01)
Citation (search report)
See references of WO 2015144305A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102014004378 A1 20151001; EP 3123461 A1 20170201; WO 2015144305 A1 20151001
DOCDB simple family (application)
DE 102014004378 A 20140326; EP 15713647 A 20150323; EP 2015000625 W 20150323