Protocol for hybrid authenticated key establishment
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United States of America Patent
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Issued Date -
Dec 9, 2004
app pub date -
Jun 3, 2003
filing date -
Jun 3, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system establishes a link key for encrypting and decrypting messages between a first device having a symmetric secret key and a second device having an asymmetric public key and private key. The first device encrypts the secret key with the public key and a first random number with the secret key. The second device decrypts the secret key with the private key and the first random number with the secret key. Then, the second device encrypts a second random number with the secret key, which is decrypted in the first device with the secret key. The first and second devices can then combine the first and second random numbers to establish the link key for encrypting and decrypting messages between the first and second device.
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