Re: questions about RNGs and FIPS 140

2010-08-26 Thread Steven Bellovin
On Aug 25, 2010, at 4:37 16PM, travis+ml-cryptogra...@subspacefield.org wrote: 3) Is determinism a good idea? See Debian OpenSSL fiasco. I have heard Nevada gaming commission regulations require non-determinism for obvious reasons. It's worth noting that the issue of determinism vs.

Re: towards https everywhere and strict transport security

2010-08-26 Thread Nicolas Williams
On Thu, Aug 26, 2010 at 12:40:04PM +1000, James A. Donald wrote: On 2010-08-25 11:04 PM, Richard Salz wrote: Also, note that HSTS is presently specific to HTTP. One could imagine expressing a more generic STS policy for an entire site A really knowledgeable net-head told me the other day

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Jerry Leichter
On Aug 25, 2010, at 4:37 PM, travis+ml-cryptogra...@subspacefield.org wrote: I also wanted to double-check these answers before I included them: 1) Is Linux /dev/{u,}random FIPS 140 certified? No, because FIPS 140-2 does not allow TRNGs (what they call non- deterministic). I couldn't tell

Re: towards https everywhere and strict transport security (was: Has there been a change in US banking regulations recently?)

2010-08-26 Thread dan
as previously mentioned, somewhere back behind everything else ... there is strong financial motivation in the sale of the SSL domain name digital certificates. While I am *not* arguing that point, per se, if having a better solution would require, or would have required, no more

Transport-level encryption with Tcpcrypt

2010-08-26 Thread Sean McGrath
From http://lwn.net/Articles/400913/ Transport-level encryption with Tcpcrypt By Jake Edge August 25, 2010 It has been said that the US National Security Agency (NSA) blocked the implementation of encryption in the TCP/IP protocol for the original ARPANET, because it wanted to be able to listen

Re: towards https everywhere and strict transport security (was: Has there been a change in US banking regulations recently?)

2010-08-26 Thread Ian G
On 25/08/10 11:04 PM, Richard Salz wrote: A really knowledgeable net-head told me the other day that the problem with SSL/TLS is that it has too many round-trips. In fact, the RTT costs are now more prohibitive than the crypto costs. I was quite surprised to hear this; he was stunned to find

Re: Is determinism a good idea? WAS: questions about RNGs and FIPS 140

2010-08-26 Thread Thierry Moreau
travis+ml-cryptogra...@subspacefield.org wrote: Hey all, I also wanted to double-check these answers before I included them: 3) Is determinism a good idea? See Debian OpenSSL fiasco. I have heard Nevada gaming commission regulations require non-determinism for obvious reasons. Do those

Re: questions about RNGs and FIPS 140

2010-08-26 Thread travis+ml-cryptography
On Thu, Aug 26, 2010 at 06:25:55AM -0400, Jerry Leichter wrote: [F]IPS doesn't tell you how to *seed* your deterministic generator. In effect, a FIPS-compliant generator has the property that if you start it with an unpredictable seed, it will produce unpredictable values. That brings

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Alexander Klimov
On Wed, 25 Aug 2010 travis+ml-cryptogra...@subspacefield.org wrote: No, because FIPS 140-2 does not allow TRNGs (what they call non-deterministic). I couldn't tell if FIPS 140-1 allowed it, but FIPS 140-2 supersedes FIPS 140-1. I assume they don't allow non-determinism because it makes the

Re: towards https everywhere and strict transport security

2010-08-26 Thread Florian Weimer
* James A. Donald: Every time you layer one communication protocol on top of another, you get another round trip. In this generality, this is not true at all. You're confusing handshakes with protocol layering. You can do the latter without the former. For example, DNS uses UDP without

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Perry E. Metzger
On Thu, 26 Aug 2010 08:14:26 -0700 travis+ml-cryptogra...@subspacefield.org wrote: On Thu, Aug 26, 2010 at 06:25:55AM -0400, Jerry Leichter wrote: [F]IPS doesn't tell you how to *seed* your deterministic generator. In effect, a FIPS-compliant generator has the property that if you start it

Re: towards https everywhere and strict transport security (was: Has there been a change in US banking regulations recently?)

2010-08-26 Thread Anne Lynn Wheeler
On 08/26/2010 06:38 AM, d...@geer.org wrote: While I am *not* arguing that point, per se, if having a better solution would require, or would have required, no more investment than the accumulated profits in the sale of SSL domain name certs, we could have solved this by now. the profit from

Re: towards https everywhere and strict transport security (was: Has there been a change in US banking regulations recently?)

2010-08-26 Thread Paul Wouters
On Thu, 26 Aug 2010, d...@geer.org wrote: as previously mentioned, somewhere back behind everything else ... there is strong financial motivation in the sale of the SSL domain name digital certificates. While I am *not* arguing that point, per se, if having a better solution would require,

Re: towards https everywhere and strict transport security

2010-08-26 Thread Anne Lynn Wheeler
On 08/25/2010 10:40 PM, James A. Donald wrote: This is inherent in the layering approach - inherent in our current crypto architecture. one of the things ran into the (ISO chartered) ANSI X3S3.3 (responsible for standards related to OSI level3 level4) meetings with regard to standardization

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Eric Murray
On Thu, Aug 26, 2010 at 12:13:06PM -0400, Perry E. Metzger wrote: It is difficult to validate that a hardware RNG is working correctly. How do you know the bits being put off aren't skewed somehow by a manufacturing defect? How do you know that damage in the field won't cause the RNG to become

Re: questions about RNGs and FIPS 140

2010-08-26 Thread dj
3) Is determinism a good idea? See Debian OpenSSL fiasco. I have heard Nevada gaming commission regulations require non-determinism for obvious reasons. The Nevada rules don't convincingly demand non determinism. They do say things that probably unintentionally exclude non determinism. 4.

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Thierry Moreau
Nicolas Williams wrote: On Thu, Aug 26, 2010 at 06:25:55AM -0400, Jerry Leichter wrote: On Aug 25, 2010, at 4:37 PM, travis+ml-cryptogra...@subspacefield.org wrote: I also wanted to double-check these answers before I included them: 1) Is Linux /dev/{u,}random FIPS 140 certified? No, because

Overclocking TLS/SSL (was: towards https everywhere and strict transport security)

2010-08-26 Thread =JeffH
Peter Gutmann pgut...@cs.auckland.ac.nz asked.. Has anyone published any figures for this, CPU speed vs. network latency vs. delay for crypto and the network? there's this (by Adam Langley).. Overclocking SSL http://www.imperialviolet.org/2010/06/25/overclocking-ssl.html ..but it doesn't

Re: towards https everywhere and strict transport security (was: Has there been a change in US banking regulations recently?)

2010-08-26 Thread Chris Palmer
Richard Salz writes: A really knowledgeable net-head told me the other day that the problem with SSL/TLS is that it has too many round-trips. In fact, the RTT costs are now more prohibitive than the crypto costs. I was quite surprised to hear this; he was stunned to find it out.

Re: questions about RNGs and FIPS 140

2010-08-26 Thread Eric Murray
On Thu, Aug 26, 2010 at 11:21:35AM -0500, Nicolas Williams wrote: Would it be possible to combine a FIPS 140-2 PRNG with a TRNG such that testing and certification could be feasible? Yes. (assuming you mean FIPS certification). Use the TRNG to seed the approved PRNG implementation. I'm