Re: [TLS] Let's remove gmt_unix_time from TLS
Hanno Böck <hanno@hboeck.de> Wed, 11 September 2013 16:53 UTC
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Date: Wed, 11 Sep 2013 18:53:29 +0200
From: Hanno Böck <hanno@hboeck.de>
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Subject: Re: [TLS] Let's remove gmt_unix_time from TLS
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On Wed, 11 Sep 2013 11:43:53 -0400 Nick Mathewson <nickm@torproject.org> wrote: > Despite the late date, much of the world is still not > synchronized to the second via an ntp-like service. This means > that different clients have different views of the current time, > which provides a fingerprint that helps to track and distinguish > them. This fingerprint is useful for tracking clients as they > move around. It can also distinguish clients using a single VPN, > NAT, or privacy network. (Tor's modified firefox avoids this by > not sending the time.) I can't help getting the feeling that you're trying to fix the wrong thing here. People use computers with a wrong clock. That's the problem here. You should try to fix that and not workaround it. My suggestion: Tor could detect on startup if the time is correct via ntp (or even through the tor network itself with the next server). If its not, it refuses to start unless an option like "iknowmytimeisbrokenandidontcare" is set. For the gui, issue a warning and an easy option to fix the time. -- Hanno Böck http://hboeck.de/ mail/jabber: hanno@hboeck.de GPG: BBB51E42
- [TLS] Let's remove gmt_unix_time from TLS Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Alfredo Pironti
- Re: [TLS] Let's remove gmt_unix_time from TLS Russ Housley
- Re: [TLS] Let's remove gmt_unix_time from TLS Eric Rescorla
- Re: [TLS] Let's remove gmt_unix_time from TLS Adam Langley
- Re: [TLS] [perpass] Let's remove gmt_unix_time fr… Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Ryan Hurst
- Re: [TLS] Let's remove gmt_unix_time from TLS Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Paul Wouters
- Re: [TLS] Let's remove gmt_unix_time from TLS p.j.bakker
- Re: [TLS] Let's remove gmt_unix_time from TLS Hanno Böck
- Re: [TLS] Let's remove gmt_unix_time from TLS Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Martin Rex
- Re: [TLS] Let's remove gmt_unix_time from TLS Xiaoyong Wu
- Re: [TLS] [perpass] Let's remove gmt_unix_time fr… Nick Mathewson
- Re: [TLS] [perpass] Let's remove gmt_unix_time fr… Martin Rex
- Re: [TLS] Let's remove gmt_unix_time from TLS Peter Gutmann
- Re: [TLS] Let's remove gmt_unix_time from TLS Marsh Ray
- Re: [TLS] [perpass] Let's remove gmt_unix_time fr… Stephen Farrell
- Re: [TLS] [perpass] Let's remove gmt_unix_time fr… Peter Gutmann
- Re: [TLS] Let's remove gmt_unix_time from TLS Wan-Teh Chang
- Re: [TLS] Let's remove gmt_unix_time from TLS Brian Smith
- Re: [TLS] Let's remove gmt_unix_time from TLS Stephen Farrell
- Re: [TLS] Let's remove gmt_unix_time from TLS Wan-Teh Chang
- Re: [TLS] Let's remove gmt_unix_time from TLS Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Nick Mathewson
- Re: [TLS] Let's remove gmt_unix_time from TLS Martin Thomson
- Re: [TLS] Let's remove gmt_unix_time from TLS Martin Rex