Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-09-11
1994-04-26
Swann, Tod R.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 380 23, 380 30, H04K 100
Patent
active
053074114
ABSTRACT:
The invention relates to a means for identification and exchange of encryption keys between communicating apparatuses for encrypted transmissions. The means comprises a card reader for smart cards connected to the communication apparatus which may be a telecommunication apparatus, e.g. of telephone or facsimile type. The reader can communicate with another reader at a called telecommunication apparatus. For identification and exchange of encryption keys the required calculations are performed by the reader or the smart card using data stored on the smart card in a protected field with limited access. The means enable intercommunication between products of different makes owing to a standard identification procedure and exchange of encryption keys.
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Anvret Lena
Mersich Laszlo
Swann Tod R.
Televerket
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