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Terminal authentication in a wireless network

  • US 7,499,548 B2
  • Filed: 06/24/2003
  • Issued: 03/03/2009
  • Est. Priority Date: 06/24/2003
  • Status: Expired due to Fees
First Claim
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1. A method performed by a user terminal of a wireless access network, the method comprising:

  • generating a shared secret to be provided to an access point of the wireless access network;

    encrypting the shared secret with an access point public key;

    pre-calculating a plurality of authenticator messages based on a corresponding plurality of estimated time parameters, each authenticator message comprising at least part of the shared secret;

    receiving an indication of a measured time parameter; and

    selecting a pre-calculated authenticator message that corresponds to the measured time parameter; and

    signing the selected authenticator message with a user terminal private key; and

    sending a message to the access point, the message including the encrypted shared secret, a user terminal certificate, and the signed authenticator message.

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