mailing list archives
Re: Security team successfully cracks SSL using 200 PS3's and MD5
From: Marshall Eubanks <tme () multicasttech com>
Date: Sat, 3 Jan 2009 10:36:08 -0500
On Jan 3, 2009, at 9:38 AM, Dorn Hetzel wrote:
Would using the combination of both MD5 and SHA-1 raise the
bar enough for now,
I have never seen this recommended (and I do try and follow this).
or are there other good prospects for a harder to crack
The Federal Information Processing Standard 180-2, Secure Hash
Standard, specifies algorithms for computing five cryptographic hash
functions — SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512.
SHA-256 is thought to be still safe, unlike SHA-1
and its use is recommended by RFC4509.
So, I would use SHA-256 if possible. (SHA-224 is a truncation of -256
- see rfc3874.)
There is, BTW, a competition to find a replacement.
On Sat, Jan 3, 2009 at 9:35 AM, William Warren <
hescominsoon () emmanuelcomputerconsulting com> wrote:
Dragos Ruiu wrote:
On 2-Jan-09, at 9:56 AM, Robert Mathews (OSIA) wrote:
Joe Greco wrote:
[ .... ]
Either we take the potential for transparent MitM attacks
we do not. I'm sure the NSA would prefer "not." :-)
As for the points raised in your message, yes, there are
problems with clients that have not taken this seriously. It is,
one thing to have locks on your door that you do not lock, and
thing entirely not to have locks (and therefore completely lack
ability to lock). I hope that there is some serious thought
going on in
the browser groups about this sort of issue.
[ ... ]
F Y I, see:
SSL Blacklist 4.0 - for a Firefox extension able to detect 'bad'
Snort rule to detect said...
alert tcp $EXTERNAL_NET $HTTP_PORTS -> $HOME_NET any (msg:"POLICY
OSCP response -- MD5 usage"; content:"content-type:
application/ocsp-response"; content:"2A 86 48 86 F7 0D 01 01 05";
policy security-ips drop, service http; reference: url,
www.win.tue.nl/hashclash/rogue-ca/; classtype: policy-violation;
World Security Pros. Cutting Edge Training, Tools, and Techniques
Vancouver, Canada March 16-20 2009 http://cansecwest.com
London, U.K. May 27/28 2009 http://eusecwest.com
pgpkey http://dragos.com/ kyxpgp
Everyone seems to be stampeding to SHA-1..yet it was broken in
we trade MD5 for SHA-1? This makes no sense.