1995-12-11 - Time-based cryptanalysis: How to defeat it?

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From: anonymous-remailer@shell.portal.com
To: cypherpunks@toad.com
Message Hash: deb675986aef2ea43574d68e6d2572874d42f84dc8604e7778e941c73cfc15cd
Message ID: <199512110656.WAA03942@jobe.shell.portal.com>
Reply To: N/A
UTC Datetime: 1995-12-11 06:57:51 UTC
Raw Date: Sun, 10 Dec 95 22:57:51 PST

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From: anonymous-remailer@shell.portal.com
Date: Sun, 10 Dec 95 22:57:51 PST
To: cypherpunks@toad.com
Subject: Time-based cryptanalysis: How to defeat it?
Message-ID: <199512110656.WAA03942@jobe.shell.portal.com>
MIME-Version: 1.0
Content-Type: text/plain



Assuming Alice is decrypting a secret message sent to her
by Bob (on her very slow C64 ;), and Mallet is watching
with a stopwatch in hand, hoping to determine Alice's secret
key...

It would be good to place inside the decryption routines
a timer (WELL PLACED!) that waits a random-number of cycles
(based on key-strokes, mouse position, etc.) to defeat this
type of cryptanalysis?








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