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Remote secure authorization

  • US 7,827,409 B2
  • Filed: 12/02/2004
  • Issued: 11/02/2010
  • Est. Priority Date: 10/07/2003
  • Status: Active Grant
First Claim
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1. A method of distributing at least one network cryptographic key to a client attempting to access a network via an edge device of said network, the method comprising the steps of:

  • receiving first information from a client,encrypting said first information with a network secret cryptographic key to generate a first cipher, said network secret cryptographic key being known to an edge device of a network and an authentication server but not to said client,sending said first cipher and a network identifier associated with said edge device of said network to said authentication server,receiving a second cipher from said authentication server,decrypting said second cipher with said network secret cryptographic key to obtain a client cryptographic key,encrypting at least one network cryptographic key with said client cryptographic key to generate a third cipher, andforwarding said third cipher to said client.

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