[45509] in Cypherpunks
Re: kocher's timing attack
daemon@ATHENA.MIT.EDU (Jiri Baum)
Sat Dec 16 23:58:01 1995
From: Jiri Baum <jirib@sweeney.cs.monash.edu.au>
To: cypherpunks@toad.com
Date: Sun, 17 Dec 1995 15:08:58 +1100 (EST)
In-Reply-To: <199512150203.VAA00869@opine.cs.umass.edu> from "Futplex" at Dec 14, 95 09:03:32 pm
Reply-To: jirib@cs.monash.edu.au
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Hello cypherpunks@toad.com (Cypherpunks Mailing List)
and futplex@pseudonym.com (Futplex)
Futplex writes:
... [in reply to others] ...
> You are overlooking the main point that this is a _timing_ attack. Unless
...
> Just beware of
> people with extremely precise stopwatches at key signing parties ;>
Hold on, you *never* sign directly at key signing parties!
Never take your key where:
- it could be stolen
- you suspect others may wish to influence your signing
- somebody might spy your passphrase (hidden cameras in ceiling)
You take fingerprints, and sign when you get back home.
Re the timing subject, do you think it'd make a good party trick?
* Think of a number between 20 and 30.
* for 4-5 numbers a, "Multiply the orignal number by <a>"
* the number you are thinking of is <number>
Now, anybody have statistics for mental arithmetic?
Jiri
- --
If you want an answer, please mail to <jirib@cs.monash.edu.au>.
On sweeney, I may delete without reading!
PGP 463A14D5 (but it's at home so it'll take a day or two)
PGP EF0607F9 (but it's at uni so don't rely on it too much)
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