Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-06-26
2010-12-07
Harper, Vincent P (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C713S168000, C713S172000, C713S178000, C713S189000, C726S012000, C380S270000, C380S258000, C380S277000
Reexamination Certificate
active
07848746
ABSTRACT:
A first processing device, which may be, for example, a wireless authentication token or an RFID tag, comprises a memory, a processor coupled to the memory, and interface circuitry coupled to the processor. The processor is operative to control the output of authentication information via the interface circuitry, where the authentication information comprises a sequence of values corresponding to images of a hash chain. A given one of the values of the sequence is utilized by a second processing device to generate a modified value suitable for providing joint authentication of the first and second processing devices.
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EMC Corporation
Harper Vincent P
Patel Mahendra
Ryan & Mason & Lewis, LLP
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