Method and system for encryption of streamed data

Details Method and system for encryption of streamed data Method and system for encryption of streamed data

2003-10-09

2008-12-16

Parthasarathy, Pramila (Department: 2136)

Cryptography

Communication system using cryptography

Symmetric key cryptography

C380S255000

Reexamination Certificate

active

07466824

ABSTRACT:
Method and system for encrypting streamed data employing fast set-up single use keys and self-synchronization. A transmitting handset produces a bitstream of voice data containing the session key and encrypted by an encryption signal based upon the session key. A receiving handset decrypts the incoming bitstream using the encryption signal and recognizes the session key, thereby establishing synchronization. The session key is derived from a seed by applying a first function to the seed. Following the call, the session key is converted into a new seed by application of a second function and the new seed is stored for use in the next call.

REFERENCES:
patent: 5768381 (1998-06-01), Hawthorne
patent: 6931128 (2005-08-01), Roberts
patent: 7076064 (2006-07-01), Relander et al.
patent: 7123593 (2006-10-01), Marque-Pucheu et al.
Menezes, Handbook of Applied Cryptography, 1997, CRC Press LLC, p. 21.

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