Nicko van Someren nicko at ncipher.com
Thu Oct 17 11:55:51 PDT 2002

On Thursday, Oct 17, 2002, at 19:39 Europe/London, Rich Salz wrote:

> Marc Branchaud wrote:
>> Any thoughts on this device?  At first glance, it doesn't seem
>> particularly impressive...
>> http://www.quizid.com/
> Looks like hardware S/Key, doesn't it?
> If I could fool the user into entering a quizcode, then it seems like 
> I could get the device and the admin database out of sync and lock the 
> user out of the system.

[Note: I have an interest, since QuizID use nCipher hardware]

Their device has a neat way of synchronizing the sequence number to the 
server which both avoids the clock drift problems that trouble RSA 
SecurID and mean that you'd have to get the user to pass you a large 
number of codes before you got them out of sync with the server.  It 
also helps them avoid some of RSA's later patents which deal with their 
troublesome clock sync problems.


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