Encryption of telephone calling card codes

Details Encryption of telephone calling card codes Encryption of telephone calling card codes

1995-12-28

1999-11-02

Kuntz, Curtis A.

Telephonic communications

With check operated control

Fraud or interference prevention

379112, 379 9101, 379 9302, 379144, 380 24, 380 23, 235380, H04M 1700

Patent

active

059784598

ABSTRACT:
A cost-efficient method that utilizes encryption techniques to prevent the unauthorized use of telephone customer calling card account and personal identification numbers (access codes), by electronic telephone network eavesdroppers and telephone company employees. The access codes are encrypted by the telecommunications carrier's access code collection device. The encrypted access codes are subsequently used instead of the clear-text access codes in all subsequent transmissions and subsequent processes that make use of access codes including billing and printing of calling card access codes.

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"Phone Card Fraud-Reduction Method," IBM Technical Disclosure Bulletin, vol. 38, No. 3, p. 185, Mar. 1995.
Robrock II, "The Intelligent Nework-Changing the Face of Telecommunications," Proceedings of the IEEE, vol. 79, No. 1, pp. 7-20, Jan. 1991.

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