Deferred billing, broadcast, electronic document distribution sy

Details Deferred billing, broadcast, electronic document distribution sy Deferred billing, broadcast, electronic document distribution sy

1997-06-05

1998-03-10

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

380 20, 380 44, 380 6, 348 3, H04L 900, H04N 7167

Patent

active

057270651

ABSTRACT:
An electronic document delivery system and method in which a broadcast center periodically sends a "catalog" of available documents to a receiving computer, thereby allowing a user to browse through the available documents without having to access the broadcast center. The documents are transmitted as packets, and the packets are decrypted as soon as they are received, eliminating the need to store both an encrypted and an decrypted version of the documents at the receiving computer. The receiving computer periodically receives information allowing it to decrypt received documents and to encrypt billing information for the receiving computer. The invention is not limited to text-only documents and can receive all types of documents, such as software, images, text, and full-motion video.

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