protocol 2 performance gain?

Higdon, David M - CNF Higdon.David at
Wed Mar 7 11:39:41 EST 2001

I was not really referring to anything but I noticed what 
appeared to be a gain so I thought I would ask the group.


-----Original Message-----
From: mouring at [mailto:mouring at]
Sent: Tuesday, March 06, 2001 4:17 PM
To: Higdon, David M - CNF
Cc: openssh-unix-dev at
Subject: Re: protocol 2 performance gain?

On Tue, 6 Mar 2001, Higdon, David M - CNF wrote:

> has anyone noticed a performance gain with protocol 2?

I assume your refering to the current snapshot. 


   - deraadt at 2001/03/05 15:56:16
     [myproposal.h ssh.1]
     switch to aes128-cbc/hmac-md5 by default in SSH2 -- faster;
     provos & markus ok
   - markus at 2001/03/05 17:17:21
     [kex.c kex.h sshconnect2.c sshd.c]
     generate a 2*need size (~300 instead of 1024/2048) random private
     exponent during the DH key agreement. according to Niels (the great
     german advisor) this is safe since /etc/primes contains strong
     primes only.

             P. C. van Oorschot and M. J. Wiener, On Diffie-Hellman key
             agreement with short exponents, In Advances in Cryptology
             - EUROCRYPT'96, LNCS 1070, Springer-Verlag, 1996, pp.332-343.

- Ben

More information about the openssh-unix-dev mailing list