Method for authenticating user terminal in IP multimedia sub-system

  • US 20080045214A1
  • Filed: 08/31/2007
  • Published: 02/21/2008
  • Est. Priority Date: 04/30/2005
  • Status: Active Grant
First Claim
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1. A method for authenticating a user equipment in an IP multimedia subsystem, comprising:

  • generating, by a Serving-Call Session Control Function (S-CSCF) entity, an authentication challenge through a Digest Authentication Algorithm in response to a subscriber request, and sending the authentication challenge to a user equipment through a Proxy-Call Session Control Function (P-CSCF) entity;

    generating, by the user equipment, an authentication response through the Digest Authentication Algorithm in accordance with a subscriber key as well as related parameters in the authentication challenge, and sending the authentication response to the S-CSCF entity through the P-CSCF entity; and

    verifying, by the S-CSCF entity, the authentication response through the Digest Authentication Algorithm in accordance with information HA1 related to the subscriber key as well as related parameters, and if the verification has been passed, determining that the authentication for the user equipment succeeds, otherwise determining that the authentication for the user equipment fails.

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