Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2003-06-12
2008-12-30
Moise, Emmanuel L (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C726S034000, C713S189000
Reexamination Certificate
active
07472274
ABSTRACT:
A method and a system for authenticating an electronic tag by a host communicating with this tag via a reader, including: calculating, on the tag side, a first digital signature using at least one first function shared by the tag and the reader, taking into account at least one first secret key known by the electronic tag and the reader only; transmitting the first signature to the reader; calculating, on the reader side, a second digital signal using at least one second function, different from the first function and shared by the reader and the host, taking the first signature into account; transmitting the second signature to the host; and checking, on the host side, the coherence between the second signature and a validation value calculated based on said second function and on a second secret key known by the host and by a single element selected from among the tag and the reader.
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French Search Report from French Patent Application 02/07298, filed Jun. 13, 2002.
Anguille Claude
Moreaux Christophe
Jorgenson Lisa K.
Moise Emmanuel L
Morris James H.
Pyzocha Michael
STMicrolectronics S.A.
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