Method for sending a secure message in a telecommunications syst

Details Method for sending a secure message in a telecommunications syst Method for sending a secure message in a telecommunications syst

1996-11-06

1999-06-01

Hayes, Gail O.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 30, 380 49, 455410, H04L 908

Patent

active

059094915

ABSTRACT:
A method for sending a secure message in a telecommunications system using public encryption keys. A sending transceiver encrypts the message c using the sender's own public encryption key Ex to generate Ex(c), and, transmits the encrypted message Ex(c) to a receiving transceiver. The receiving transceiver then encrypts the encrypted message Ex(c) using the encryption key Ey of the intended receiver of the message to generate the message Ey(Ex(c)), and, transmits the message Ey(Ex(c)) back to the sending transceiver. The sending transceiver then decrypts the message Ey(Ex(c)) using sender's private decryption key to generate Dx(Ey(Ex(c)))=Ey(c), and, transmits the message Ey(c) back to the receiving transceiver. The receiving transceiver then either decrypts the message using its own decryption key Dy, if it is the intended receiver of the message, to generate Dy(Ey(c))=c, or, forwards the message on to the intended receiver of the message, if it is not the intended receiver of the message, where the intended receiver decrypts the message using its own decryption key Dy.

REFERENCES:
patent: 4411017 (1983-10-01), Talbot
Bruce Schneier, Applied Cryptography, Book, pp. 516-517, Oct. 18, 1995.
Menezes, Oorschot, Vanstone, Handbook of Applied Cryptography, Chapter 8, Oct. 1996.

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