Re: cleversafe says: 3 Reasons Why Encryption is Overrated

2009-07-26 Thread james hughes
On Jul 24, 2009, at 9:33 PM, Zooko Wilcox-O'Hearn wrote: [cross-posted to tahoe-...@allmydata.org and cryptogra...@metzdowd.com] Disclosure: Cleversafe is to some degree a competitor of my Tahoe- LAFS project. ... I am tempted to ignore this idea that they are pushing about encryption

Re: cleversafe says: 3 Reasons Why Encryption is Overrated

2009-07-26 Thread Jerry Leichter
On Jul 26, 2009, at 12:11 AM, james hughes wrote: On Jul 24, 2009, at 9:33 PM, Zooko Wilcox-O'Hearn wrote: [cross-posted to tahoe-...@allmydata.org and cryptography@metzdowd.com ] Disclosure: Cleversafe is to some degree a competitor of my Tahoe- LAFS project. ... I am tempted to ignore

Re: XML signature HMAC truncation authentication bypass

2009-07-26 Thread Peter Gutmann
Jon Callas j...@callas.org writes: On Jul 17, 2009, at 8:39 PM, Peter Gutmann wrote: PGP Desktop 9 uses as its default an iteration count of four million (!!) for its password hashing, which looks like a DoS to anything that does sanity-checking of input. That's precisely what it is -- a

The latest Flash vulnerability and monoculture

2009-07-26 Thread Perry E. Metzger
This is purely about security, not on crypto. For those of you not in the know, there is an exploitable hole in Adobe's Flash right now, and there is no fix available yet: http://www.adobe.com/support/security/advisories/apsa09-03.html (See also:

Re: Fast MAC algorithms?

2009-07-26 Thread James A. Donald
From: Nicolas Williams nicolas.willi...@sun.com For example, many people use arcfour in SSHv2 over AES because arcfour is faster than AES. Joseph Ashwood wrote: I would argue that they use it because they are stupid. ARCFOUR should have been retired well over a decade ago, it is weak, it

ADMIN: slight list hiccup today

2009-07-26 Thread Perry E. Metzger
If you submitted a post to the list for about an hour this afternoon (as measured by the US/Eastern timezone), it probably bounced. There was a brief period where email on the list server was misconfigured. My apologies, and the problem has been fixed. Perry

Re: Fast MAC algorithms?

2009-07-26 Thread james hughes
On Jul 27, 2009, at 4:50 AM, James A. Donald wrote: From: Nicolas Williams nicolas.willi...@sun.com For example, many people use arcfour in SSHv2 over AES because arcfour is faster than AES. Joseph Ashwood wrote: I would argue that they use it because they are stupid. ARCFOUR should

Re: XML signature HMAC truncation authentication bypass

2009-07-26 Thread Jon Callas
Where this falls apart completely is when there are asymmetric capabilities across sender and receiver. You are of course correct, Peter, but are you saying that we shouldn't do anything? I don't believe that we should roll over and die. We should fight back, even if the advantage is to

Re: The latest Flash vulnerability and monoculture

2009-07-26 Thread Jerry Leichter
On Jul 26, 2009, at 2:27 PM, Perry E. Metzger wrote: ...[T]here is an exploitable hole in Adobe's Flash right now, and there is no fix available yet This highlights an unfortunate instance of monoculture -- nearly everyone on the internet uses Flash for nearly all the video they watch, so

Re: The latest Flash vulnerability and monoculture

2009-07-26 Thread Perry E. Metzger
Jerry Leichter leich...@lrw.com writes: While I agree with the sentiment and the theory, I'm not sure that it really works that way. How many actual implementations of typical protocols are there? I'm aware of at least four TCP/IP implementations in common use, several common HTTP servers