quantum hype

[Michael_Heyman at NAI.com]

> From: owner-cryptography at metzdowd.com
> [mailto:owner-cryptography at metzdowd.com]On Behalf Of Dave Howe
> 
> Peter Fairbrother may well be in possession of a break for the QC hard
> problem - his last post stated there was a way to "clone" photons with
> high accuracy in retention of their polarization
> [SNIP]
>
Not a break at all. The physical limit for cloning is 5/6ths of the bits will clone true. Alice need only send 6 bits for every one bit desired to assure Eve has zero information. For a 256-bit key negotiation, Alice sends 1536 bits and hashes it down to 256 bits for the key.

-Michael Heyman

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