Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1995-04-19
1997-05-06
Tarcza, Thomas H.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 49, 380 20, H04L 900, H04N 7167
Patent
active
056278926
ABSTRACT:
Secure point-to-point communication of information to specific terminals is provided via a shared network. Far in advance of the establishment of an information session with a particular one of a plurality of terminals, a unique session identifier is securely delivered to the terminal by a highly secure entity. Information to be provided to the terminal is subsequently encrypted under the session identifier of that terminal by an insecure connection manager. The encrypted information is inserted into designated locations in a signal multiplex. The signal multiplex is transmitted over a portion of the network serving the terminal that is to receive the information. The terminal is informed of the designated locations of the encrypted information in the signal multiplex and of a transmission frequency at which the signal multiplex is carried on the network portion. The terminal tunes to the transmission frequency to locate the signal multiplex, recovers the encrypted information from the designated locations in the multiplex, and then decrypts the information using the terminal's unique session identifier.
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General Instrument Corporation of Delaware
Hoppin Ralph F.
Laufer Pinchus M.
Lipsitz Barry R.
Tarcza Thomas H.
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