1996-05-28 - Re: Layman’s explanation for limits on escrowed encryption …

Header Data

From: “Mark M.” <markm@voicenet.com>
To: cypherpunks@toad.com
Message Hash: 18db79102d7cdeefab9567c47d33d893e10d45315a60b541601b61e186d9ada7
Message ID: <Pine.LNX.3.93.960527203358.1163A-100000@gak>
Reply To: <01I53K6SDN348Y4Z90@mbcl.rutgers.edu>
UTC Datetime: 1996-05-28 05:50:10 UTC
Raw Date: Tue, 28 May 1996 13:50:10 +0800

Raw message

From: "Mark M." <markm@voicenet.com>
Date: Tue, 28 May 1996 13:50:10 +0800
To: cypherpunks@toad.com
Subject: Re: Layman's explanation for limits on escrowed encryption ...
In-Reply-To: <01I53K6SDN348Y4Z90@mbcl.rutgers.edu>
Message-ID: <Pine.LNX.3.93.960527203358.1163A-100000@gak>
MIME-Version: 1.0
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On Fri, 24 May 1996, E. ALLEN SMITH wrote:

> 	Hmm.... what were the normal key-length recommendations again? This
> appears to imply that the NSA can break at least 64-bit, and probably 80-bit,
> encryption. How does this translate into public key lengths? E.g., how many
> normal bits is a 1024-bit PGP key equivalent to?
> 	-Allen

The normal key-length recommendation was 96 bits.  64 bits and 80 bits are
equivalent to 512 bits and 768 bits respectively.  I would guess that a
1024-bit key is about as strong as an 96-bit key.  The first two numbers are
from _Applied Cryptography_; my estimate is an extrapolation from the data in
AC.

-- Mark

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
markm@voicenet.com              | finger -l for PGP key 0xe3bf2169
http://www.voicenet.com/~markm/ | d61734f2800486ae6f79bfeb70f95348
((2b) || !(2b))                 | Old key now used only for signatures
"The concept of normalcy is just a conspiracy of the majority" -me



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