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Secure remote subscription module access

  • US 8,295,808 B2
  • Filed: 03/22/2002
  • Issued: 10/23/2012
  • Est. Priority Date: 05/08/2001
  • Status: Expired due to Term
First Claim
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1. A method of granting a client communications terminal access to a subscription module of a server communications terminal, the method comprising the steps of:

  • establishing a communication link between the client communications terminal and the server communications terminal wherein the server communications terminal includes the subscription module having an authenticating functionality;

    authenticating the client communications terminal by the subscription module using a key-based authentication procedure based on a first secret key stored in both the client communications terminal and the subscription module;

    generating a second secret key;

    exchanging the second secret key between the client communications terminal and the subscription module;

    encrypting data related to the subscription module using an encryption key derived from the second secret key; and

    communicating the encrypted data between the server communications terminal and the client communications terminal via the communications link.

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