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UK Voice Crypto Standard Built For Key Escrow, Mass Surveillance |
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Présentation : Trailrunner7 writes The U.K. government's standard for encrypted voice communications, which already is in use in intelligence and other sectors and could be mandated for use in critical infrastructure applications, is set up to enable easy key escrow, according to new research. The standard is known as Secure Chorus, which implements an encryption protocol called MIKEY-SAKKE. The protocol was designed by GCHQ, the U.K.'s signals intelligence agency, the equivalent in many ways to the National Security Agency in the United States. MIKEY-SAKKE is designed for voice and video encryption specifically, and is an extension of the MIKEY Multimedia Internet Keying protocol, which supports the use of EDH Ephemeral Diffie Hellman for key exchange. MIKEY supports EDH but MIKEY-SAKKE works in a way much closer to email encryption. The initiator of a call generates key material, uses SAKKE to encrypt it to the other communication partner responder , and sends this message to the responder during the set-up of the call. However, SAKKE does not require that the initiator discover the responder's public key because it uses identity-based encryption IBE , Dr. Steven Murdoch of University College London's Department of Computer Science, wrote in a new analysis of the security of the Secure Chorus standard. By design there is always a third party who generates and distributes the private keys for all users. This third party therefore always has the ability to decrypt conversations which are encrypted using these private keys, Murdoch said by email. He added that the design of Secure Chorus is not an accident. Share on Google Read more of this story at Slashdot.
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