Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2006-04-17
2011-11-08
Pearson, David (Department: 2438)
Cryptography
Communication system using cryptography
Time segment interchange
C710S052000, C713S176000, C726S030000
Reexamination Certificate
active
08054968
ABSTRACT:
An apparatus and method are provided for deciphering recorded digital audio signals and using a smart card to pay for deciphering. Encrypted digital audio signals are recorded onto a recording medium, such as a compact disc or the like. When the user desires to listen to the recording, the encrypted recording is inserted into a player/recorder and a prepaid smart card is inserted into a smart card reader connected to the player/recorder. The smart card reader deducts a predetermined value from the card before allowing the player/recorder to decipher the encrypted recording, and record the deciphered audio onto a recording medium for playback.
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Falcone Frank
Lerner Kenneth
Ma Hien D.
Marko Paul D.
Patsiokas Stelios
Mehedi Morshed
Pearson David
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