Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1997-05-19
1998-06-23
Tarcza, Thomas H.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 49, 380 51, 705401, 705400, H04L 900
Patent
active
057712891
ABSTRACT:
A method and apparatus for transmitting electronic messages wherein payment is required for the transmission. Payment is made as messages are transmitted using previously obtained electronic stamps or credits. An electronic sender obtains in advance the electronic stamps which are usable to pay for the transmission. Electronic stamps are represented by a signal which is transmitted with the message and must be present for transmission to occur. The encoded signal preferably includes authenticating data. The balance of electronic stamps available is debited as stamps are used and incremented as they are obtained. The value of stamps necessary to pay for a transmission can vary according to the data content of the electronic message and the invention therefore preferably examines the data content of the message and encodes the proper electronic stamp amount. The invention also preferably alters the encoded signal representing the stamps which have been used for transmission to prevent further use of the signal as payment for another transmission. The electronic message preferably is encrypted prior to transmission and decrpyted when it is received by an electronic addressee.
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Correspondence dated Apr. 7, 1995 concerning USPS conference.
Intel Corporation
Laufer Pinchus M.
Tarcza Thomas H.
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