Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method for authenticating an external authorizing datum by a portable object, such as a memory card

Method for authenticating an external authorizing datum by a portable object, such as a memory card

US Patent 4907272 · Granted Mar 6, 1990

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Method for protecting the processing of sensitive information in a monolithic se2008
System and method for using multiple working memories to improve microprocessor 2006
Method for authenticating a portable object, corresponding portable object, and 2005
Smart integrated circuit2005
Process for storage and use of sensitive information in a security module and th2003
Integrated circuit and method for decorrelating an instruction sequence of a pro1999
Process for loading a protected storage zone of an information processing device1998
Process for entry of a confidential piece of information and associated terminal1998
Method for producing a common key in two devices, in order to implement a common1998
Data processing system including programming voltage inhibitor for an electrical1996
Key protection device for smart cards1996
Method for signature of an information processing file, and apparatus for implem1995