Method for session key derivation in an IC card
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United States of America Patent
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Oct 23, 2012
Grant Date -
Jan 10, 2008
app pub date -
Jun 28, 2007
filing date -
Jun 29, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A key session derivation is provided during a mutual authentication between a master IC card storing a master key, and a user IC card storing a key-seed. The master IC card and the user IC card are connected through a communication interface for a communication session. A first random number associated to the user IC card is generated. First and second sub keys are derived from the key-seed. First and second session sub keys are respectively derived through the first sub key in combination with the first random number, and through the second sub key in combination with the first random number. The first and second session sub keys are joined in at least a session key for the communication session.
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