[60126] in cryptography@c2.net mail archive
Re: Can you keep a secret? This encrypted drive can...
daemon@ATHENA.MIT.EDU (Peter Gutmann)
Mon Nov 6 10:24:22 2006
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From: pgut001@cs.auckland.ac.nz (Peter Gutmann)
To: alserkli@inbox.ru, cryptography@metzdowd.com
In-Reply-To: <TheMailAgent.37b1c0c4cc136@33ff138fc7a1046606b2>
Date: Sat, 04 Nov 2006 13:06:54 +1300
Alexander Klimov <alserkli@inbox.ru> writes:
>If a PC is used by an interactive user, it is irrelevant how much access time
>is increased, as far as the user cannot see a difference without a timer.
>Several times I have read that disk encryption is not noticeable.
I agree that in most cases the access-time argument is a red herring. Back
when I wrote SFS (DOS-based FDE that ran on 386's), I got plenty of feedback
from users that the slowdown was barely or not at all noticeable. The only
time I've really noticed it (using current FDE software, not on a 25 MHz 386)
is when copying large amounts of data onto an encrypted partition, but that's
(a) a very rare event and (b) somewhat slow anyway even for an unencrypted
copy.
Peter.
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