Crypto-synchronization for secure communication
First Claim
1. A method of facilitating crypto synchronization for secure communication, the method comprising:
- encrypting communication data using an encrypting process to provide encrypted communication data;
providing synchronization information to synchronize a decrypting process at a target communication unit; and
substituting in a predetermined manner the synchronization information for a portion of the encrypted communication data to provide resultant data to send to the target communication unit.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus (213) and corresponding methods (FIG. 7) to facilitate maintaining crypto synchronization while processing communication signals in a communication unit includes a vocoder (215) configured to convert input audio band signals to vocoder output frames; a crypto processor (217) configured to encrypt the vocoder output frames to provide encrypted output frames; and a synchronizer (219) configured to substitute in a predetermined manner synchronization information corresponding to an encryption state of the crypto processor for a portion of the encrypted data in a portion of the encrypted output frames to provide resultant output synchronization frames suitable for synchronizing a decryption process at a target communication unit.
29 Citations
20 Claims
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1. A method of facilitating crypto synchronization for secure communication, the method comprising:
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encrypting communication data using an encrypting process to provide encrypted communication data;
providing synchronization information to synchronize a decrypting process at a target communication unit; and
substituting in a predetermined manner the synchronization information for a portion of the encrypted communication data to provide resultant data to send to the target communication unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of facilitating crypto synchronization for secure communication, the method comprising;
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obtaining a frame of communication data;
determining whether a portion of the frame includes synchronization information; and
when the frame includes synchronization information using the synchronization information to update a decryption process, thereby facilitating the crypto synchronization. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus arranged and constructed to facilitate maintaining crypto synchronization while processing communication signals, the apparatus comprising:
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a vocoder configured to convert input audio band signals to vocoder output frames;
a crypto processor coupled to the vocoder and configured to encrypt the vocoder output frames to provide encrypted output frames; and
a synchronizer coupled to the crypto processor and configured to substitute in a predetermined manner synchronization information corresponding to an encryption state of the crypto processor for a portion of the encrypted data in a portion of the encrypted output frames to provide resultant output synchronization frames. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification