[109189] in Cypherpunks
birthdate statistics?
daemon@ATHENA.MIT.EDU (David Honig)
Sat Mar 13 11:57:30 1999
Date: Sat, 13 Mar 1999 08:00:18 -0800
To: cypherpunks@toad.com
From: David Honig <honig@sprynet.com>
Reply-To: David Honig <honig@sprynet.com>
If you learn someone's birthdate, have you obtained log2 (365 1/4) bits?
If you learn that someone was born in the first half-year, is this 1 bit?
I.E., Are birthdates truly uniformly distributed?
Anyone thought about the applicability of cryptanalysis to
identifying people from census info? About identifying
Finns from their soon-to-be public health records.
(No, I don't want to do this, but how would you reason
about defenses against this kind of data mining?)
