Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2003-07-21
2009-11-17
Barron, Jr., Gilberto (Department: 2432)
Cryptography
Communication system using cryptography
Wireless communication
C370S336000
Reexamination Certificate
active
07620184
ABSTRACT:
A process for transmitting encrypted data through a radio transmission channel having a frame structure such that a TDMA frame comprises at least time slots of a first type forming a traffic channel and at least one time slot of a second type forming an associated signaling channel, comprises steps according to which:a sequence of encrypted data packets is transmitted in the traffic channel on the basis of a determined time slot of the first type, whereas an associated cryptographic synchronization information cue is transmitted in the associated signaling channel inside a determined time slot of the second type, anda cryptographic synchronization delay information cue relating to the time gap between said determined time slot of the second type and said determined time slot of the first type, is also transmitted in the associated signaling channel.
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International Search Report of PCT/FR03/02302 issued Jan. 14, 2004.
Almeida Devin
Barron Jr. Gilberto
Eads Secure Networks
McCracken & Frank LLP
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