[cryptography] Well, that's depressing. Now what?
smb at cs.columbia.edu
Fri Jan 27 14:01:17 EST 2012
> Or at least that's what everyone thought. More recently, various groups have begun to focus on a fly in the ointment: the practical implementation of this process. While quantum key distribution offers perfect security in practice, the devices used to send quantum messages are inevitably imperfect.
This is only surprising if you assume large values of "everyone". Anyone in the real world has long since worried about implementations. Remember Bob Morris' Rule 1 of cryptanalysis: check for plaintext. (http://www.ieee-security.org/Cipher/ConfReports/conf-rep-Crypto95.html)
--Steve Bellovin, https://www.cs.columbia.edu/~smb
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