Quote from: Banjo on May 24, 2012, 07:13 pmQuoteSingh postulates a "quantum" computer would be able to do just that but the technology is apparently still in its infancy.You kind of have to wonder sometimes though... your GCHQ developed public key cryptography secretly three years before Diffie and Hellman did. And they didn't bother saying so until 1997.Yes indeed Clifford Cocks and James Ellis - worked out both concept and proof of Public Key Cryptography. Unfortunately computers in the UK weren't up to scratch to implement - also it was far from clear that patenting mathematical algorithms was possible in my country (this would be possible now). As you can imagine GCHQ also had a vested interest in keeping such revelations to themselves, given the nature of their work!It makes you wonder what they've come up with in the past ten years!V.