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Wireless subscription portability

  • US 6,178,506 B1
  • Filed: 10/23/1998
  • Issued: 01/23/2001
  • Est. Priority Date: 10/23/1998
  • Status: Expired due to Term
First Claim
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1. A method for registering a wireless subscription to a wireless terminal, the method comprising the steps of:

  • a) entering a user identifier) and a password) into the wireless terminal;

    b) at the wireless terminal;

    i) generating a public/private key pair;

    ii) using the password to encrypt the wireless terminal'"'"'s public key according to a secure key exchange (SKE) protocol, thereby forming a first SKE message; and

    iii) transmitting the user identifier and the first SKE message to a home system;

    c) at the home system;

    i) generating a public/private key pair;

    ii) using the user identifier to determine the password;

    iii) using the password to encrypt the home system'"'"'s public key according to an SKE protocol, thereby forming a second SKE message;

    iv) transmitting the second SKE message to the wireless terminal;

    v) using the password to decrypt the wireless terminal'"'"'s public key; and

    vi) using the home system'"'"'s private key and the wireless terminal'"'"'s public key to form a session key;

    d) at the wireless terminal;

    i) using the password to decrypt the home system'"'"'s public key; and

    ii) using the wireless terminal'"'"'s private key and the home system'"'"'s public key to form the session key; and

    e) at both the wireless terminal and at the home system, using the session key to download all or part of a Virtual User Identification Module (VUIM) from the home system to the wireless terminal.

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