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WCDMA 3G VOICE COMMUNICATION PROTECTION METHOD AND TERMINAL USING THE SAME

  • US 20130136260A1
  • Filed: 04/04/2012
  • Published: 05/30/2013
  • Est. Priority Date: 11/28/2011
  • Status: Active Grant
First Claim
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1. A Wideband Code Division Multiple Access 3rd Generation (WCDMA 3G) voice communication protection method, the method being performed by a terminal operating in conjunction with a Secure-Universal Subscriber Identity Module (S-USIM) for voice communication protection and configured to protect WCDMA 3G voice communication, comprising:

  • when a calling terminal connects a voice communication channel to a called terminal, preparing for secure voice communication by collecting information about relevant voice communication;

    at the calling terminal, setting synchronous data by exchanging the voice communication information with the called terminal, and performing a secure synchronization procedure based on the set synchronous data;

    at each of S-USIMs that operate in conjunction with the calling and called terminals, generating a session key for secure voice communication based on the synchronous data; and

    performing secure communication by encrypting and transmitting voice-coded data to be transmitted based on the session key, and decrypting and reproducing received voice-coded data based on the session key.

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