Re: Security through kittens, was Solving password problems

2009-03-02 Thread Peter Gutmann
James A. Donald jam...@echeque.com writes: The interesting thing is that it and similar phishes do not seem to have been all that successful - few people seemed to notice at all, the general reaction being to simply hit the spam key reflexively, much as people click away popup warnings

Re: Security through kittens, was Solving password problems

2009-02-25 Thread RL 'Bob' Morgan
Clever though this scheme is, man-in-the middle attacks make it no better than a plain SSL login screen. Since the bad guy knows what site you're trying to reach, he can use your usercode to fetch the shared secret from the real site and present it to you on his fake site. It's true, the

Re: Security through kittens, was Solving password problems

2009-02-25 Thread Peter Gutmann
John Levine jo...@iecc.com writes: Clever though this scheme is, man-in-the middle attacks make it no better than a plain SSL login screen. You don't even need a MITM, just replace the site image on your phishing site with either a broken- image picture or a message that your award-winning

Re: Security through kittens, was Solving password problems

2009-02-25 Thread John Levine
This means a site paying attention to such things could notice a change in IP address, or, if several users were attacked this way, notice repeated connections from the same IP. (Granted the MITM could distribute the queries over a botnet, but it raises the bar somewhat.) I have no idea if sites

Re: Security through kittens, was Solving password problems

2009-02-25 Thread Ray Dillinger
On Wed, 2009-02-25 at 14:53 +, John Levine wrote: You're right, but it's not obvious to me how a site can tell an evil MITM proxy from a benign shared web cache. The sequence of page accesses would be pretty similar. There is no such thing as a benign web cache for secure pages. If you

Re: Security through kittens, was Solving password problems

2009-02-25 Thread Steven M. Bellovin
On Wed, 25 Feb 2009 10:04:40 -0800 Ray Dillinger b...@sonic.net wrote: On Wed, 2009-02-25 at 14:53 +, John Levine wrote: You're right, but it's not obvious to me how a site can tell an evil MITM proxy from a benign shared web cache. The sequence of page accesses would be pretty

Re: Security through kittens, was Solving password problems

2009-02-25 Thread James A. Donald
John Levine jo...@iecc.com writes: Clever though this scheme [kittens] is, man-in-the middle attacks make it no better than a plain SSL login screen. Peter Gutmann wrote: You don't even need a MITM, just replace the site image on your phishing site with either a broken- image picture or a

Re: Security through kittens, was Solving password problems

2009-02-24 Thread John Levine
you enter a usercode in the first screen, you are presented with a second screen to enter your password. The usercode is a mnemonic 6-character code such as HB75RC (randomly generated, you receive from the server upon registration). Your password is freely choosen by you upon registration.That