Method for providing a secure communication between two devices and application of this method
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Apr 2, 1999
filing date -
Apr 3, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a method for providing a secure communication between two devices, a first device generates a random key (Ci) and transfers this key to a second device in a first message encrypted using a public key. The second device decrypts the first encrypted message by means of a corresponding secret key to obtain the random key (Ci) and this random key is used to encrypt and decrypt all transmissions between these devices. In a decoder for a pay TV system, comprising a conditional access module and a smart card, this method is applied to provide a secure communication between the control access module and the smart card and/or between the decoder and the conditional access module.
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