Inventor
ARDITTI DAVID
FR11 patents
Patents
11 patentsUS5991413ANov 23, 1999
Process for the acceptance of a virtual prepaid card use request permitting the reuse of its serial number
FRANCE TELECOM397 citations94
US6205553B1Mar 20, 2001
Method for controlling independent secure transactions by means of a single apparatus
FRANCE TELECOM76 citations92
US5894519AApr 13, 1999
Process for the dissimulaton of a secret code in a data authentication device
FRANCE TELECOM25 citations92
US5602915AFeb 11, 1997
Process for the control of secret keys between two smart cards
FRANCE TELECOM42 citations92
US6125445ASep 26, 2000
Public key identification process using two hash functions
FRANCE TELECOM35 citations90
US6529886B1Mar 4, 2003
Authenticating method for an access and/or payment control system
FRANCE TELECOM48 citations89
US7003499B2Feb 21, 2006
Service activation by virtual prepaid card
FRANCE TELECOM47 citations88
US5481612AJan 2, 1996
Process for the authentication of a data processing system by another data processing system
FRANCE TELECOM24 citations88
US5862224AJan 19, 1999
Cryptographic process for protection against fraud
FRANCE TELECOM12 citations73
US5347650ASep 13, 1994
Device for transforming a digital data sequence into a condensed digital data block using tables and logic operators
FRANCE TELECOM6 citations62
US7526648B2Apr 28, 2009
Cryptographic method of protecting an electronic chip against fraud
FRANCE TELECOM4 citations61