[EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > This article leads one to believe that one can eavesdrop without > being detected and with nearly 5/6ths confidence of the data on > a quantum crypto communication. This is in contrast to the claim > to fame of quantum crypto that the receiver will know if there > is an eavesdropper. (This is what makes quantum crypto work when > all public key crypto gets broken.)
On a sidenote, keep in mind that a success rate of 5/6th is not nearly good enough to successfully copy (intercept) multiple photons (bits). 5/6 = 83% per bit gives you (5/6)^8 = 23% confidence per byte, or (5/6)^16 = 5% for 2 bytes, or even (5/6)^128 = 7E-9% for 16 bytes which clearly is not as alarming as the 5/6th look in the first place; real world transmissions would surely be large enough to get that interception confidence rate down. On the other hand, that confidence rate may well be expected to get much better than 5/6th by the time we actually use quantum crypto in the real world. Cheers, Dan -- Daniel Roethlisberger <[EMAIL PROTECTED]> PGP Key ID 0x8DE543ED with fingerprint 6C10 83D7 2BB8 D908 10AE 7FA3 0779 0355 8DE5 43ED --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]
