iirc very similar problem was made public several years ago and there was online demo.
a solution may be to disable browser cache - stops at least the privacy problem between sessions. -- where do you want bill gates to go today? On Tue, Feb 14, 2006 at 08:23:35AM -0800, Adam Gleave wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > First, sorry if this has been mentioned before. I've searched and > haven't found any mention, but it seems too obvious to have not > already been reported. > > Basically, client gets etag from server, client sends etag to server > next time it connects, server can associate client. > > Might not sound significant, but if Gmail - for instance - gives > people Etag's, they - and anyone listening in on the connection - can > associate unanonnimized accounts with anonymized accounts. > > I tested this on tor + privoxy and it worked. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.0 (OpenBSD) > > iQIVAwUBQ/IDmsLXg8DOh72JAQK94hAAhCS1r7b6R1xJa9QuGD2MNJLZbNPuZxbc > 4d9R/5wV2Xa2/UDbGwjAoX2kZNsje9X+tLwIcprSp1sUavXnYZZZC2GJblvmc3j7 > UDAVo3Ge44U4GFTP03l86DPWD18d6PmkYkrdUkOJfCiaGDSnhlsOjvywFUqOIvDq > cLuDrKXYn2XCu1wEG5BUPVKQSRdIvyK4lsIEGUlUgVCsp5H0ComeVIOANcNUxwrW > GGnvh7X+6lzbpLAsb89QME3I8+2CcHhGjkbGr47R/eBcjU1zGKObbVS+4McYgJaY > VL5hNnTUgst4a+m3mm6dPSm+n/MDurnXVq+AvWOf0YA6yjZO+ve6vUQsfrfujN2d > 3p+4xj5cNWS1AMpF9/0lcSFwOr43hfOG4xePbdyXOppMeSTMDGf2ApuPvpjn4jKg > nGhDqq4Ho2DZDnoMYhYtdeW6dB7QGxluChmC0Mflnaar1EBJyUrqppPfDPPK8OLG > /8ZVgJo3qR+ruKGpfzC7pKP43Q8gMRUWu6YuPg92SIojgd2mJXfR2zlRQkgZeg71 > CO+use+wCeuFMw0ICA64dfwIJrl7EoAaNTTAaKgoy8Wiklh4y8jN3xclSPqv1QWv > kKqTA5ZeTlzxZyM1lLHJ05ruBk1WUBQ7TKijEX67hrQrkBFPw3yB1clHbwLotVjV > ls51uf4YtAM= > =pvn0 > -----END PGP SIGNATURE----- > _______________________________________________ > Full-Disclosure - We believe in it. > Charter: http://lists.grok.org.uk/full-disclosure-charter.html > Hosted and sponsored by Secunia - http://secunia.com/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
