METHOD AND SYSTEM FOR SECURITY ENHANCEMENT FOR MOBILE COMMUNICATIONS
First Claim
1. A method comprising:
- choosing, at a transmitter, bits within a layer 1 header of a slow associated control channel (‘
SACCH’
) message for randomization; and
setting, at the transmitter, said chosen bits randomly prior to channel coding and encryption of said slow associated control channel message.
7 Assignments
0 Petitions
Accused Products
Abstract
A method and system for enhanced security for A5/1 encoding, the method including choosing, at a transmitter, bits within a layer 1 header of a slow associated control channel (‘SACCH’) message for randomization; and setting, at the transmitter, the chosen bits randomly prior to channel coding and encryption of the slow associated control channel message. Further the method may include choosing, at a transmitter, a number of bits to toggle after convolution coding of a message containing a slow associated control channel message, the number of toggled bits being sufficiently low to allow correction at a receiver; and toggling, at the transmitter, said bits based on the channel conditions of the message.
16 Citations
20 Claims
-
1. A method comprising:
-
choosing, at a transmitter, bits within a layer 1 header of a slow associated control channel (‘
SACCH’
) message for randomization; andsetting, at the transmitter, said chosen bits randomly prior to channel coding and encryption of said slow associated control channel message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A transmitter comprising a processor configured to:
-
choose, at the transmitter, bits within a layer 1 header of a slow associated control channel (‘
SACCH’
) message for randomization; andset, at the transmitter, said chosen bits randomly prior to channel coding and encryption of said slow associated control channel message. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification