Re: When rsa vs dsa

From: Anne & Lynn Wheeler (lynn_at_garlic.com)
Date: 01/24/04 

Date: Sat, 24 Jan 2004 17:10:43 GMT

Simon Tatham <anakin@pobox.com> writes:
> On the contrary. An RSA signature is about the same size as the
> modulus of the RSA key. So for a 1024-bit key, that's _128_ bytes.

yep, severe brain check there ...

minor additional information as to key strengths ... following
from internet-draft on key lengths:
http://www.ietf.org/internet-drafts/draft-orman-public-key-lengths-07.txt

System
requirement Symmetric RSA or DH DSA subgroup
for attack key size modulus size size
resistance (bits) (bits) (bits)
(bits)

    70 70 947 129
    80 80 1228 148
    90 90 1553 167
   100 100 1926 186
   150 150 4575 284
   200 200 8719 383
   250 250 14596 482 

--
Anne & Lynn Wheeler | http://www.garlic.com/~lynn/
Internet trivia 20th anv http://www.garlic.com/~lynn/rfcietff.htm