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Deferred billing, broadcast, electronic document distribution system and method

  • US 6,728,878 B2
  • Filed: 08/06/2001
  • Issued: 04/27/2004
  • Est. Priority Date: 11/14/1994
  • Status: Expired due to Fees
First Claim
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1. A receiving apparatus in a communication system having a broadcast center that sends a file as a plurality of packets, said receiving apparatus comprising:

  • a memory; and

    a broadcast receiver for, on a packet-by-packet basis, both receiving and decrypting each packet as it is received and storing the decrypted packet in said memory, wherein said broadcast receiver stores the decrypted packets in said memory so as to reassemble the file in order, wherein the broadcast center repeatedly sends the entire file, and wherein in response to an encrypted packet not being received by said broadcast receiver from a first sending by the broadcast center of the entire file, which results in a gap in the reassembled file, said broadcast receiver (i) keeps track of the gap in the reassembled file and (ii) receives the packet from a subsequent sending by the broadcast center of the entire file and decrypts the packet so as to fill in the gap in the reassembled file.

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