[liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Eugen Leitl
(See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) http://news.cnet.com/8301-13578_3-57595202-38/feds-put-heat-on-web-firms-for-master-encryption-keys/ Feds put heat on Web firms for master encryption keys Whether the FBI and NSA have the legal authority to obtain the master keys that

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Nick
On Thu, Jul 25, 2013 at 11:19:22AM +0200, Eugen Leitl wrote: (See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) Would Convergence help here? I can't see how. If a government secretly aquired the SSL private keys for a site, and the site continued using them, then no convergence notary

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Eugen Leitl
On Thu, Jul 25, 2013 at 11:22:25AM +0100, Nick wrote: On Thu, Jul 25, 2013 at 11:19:22AM +0200, Eugen Leitl wrote: (See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) Would Convergence help here? I can't see how. If a government secretly aquired the SSL private keys for a site, and

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread David Edmondson
On Thu, Jul 25 2013, Eugen Leitl wrote: On Thu, Jul 25, 2013 at 11:22:25AM +0100, Nick wrote: On Thu, Jul 25, 2013 at 11:19:22AM +0200, Eugen Leitl wrote: (See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) Would Convergence help here? I can't see how. If a government secretly

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Dan Cote
This article details deploying forward secrecy. https://community.qualys.com/blogs/securitylabs/2013/06/25/ssl-labs-deploying-forward-secrecy On Thu, Jul 25, 2013 at 5:54 AM, Tom Ritter t...@ritter.vg wrote: On 25 July 2013 06:41, Ben Laurie b...@links.org wrote: What helps here is perfect

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Owen Barton
On Thu, Jul 25, 2013 at 3:41 AM, Ben Laurie b...@links.org wrote: On 25 July 2013 11:22, Nick liberationt...@njw.me.uk wrote: On Thu, Jul 25, 2013 at 11:19:22AM +0200, Eugen Leitl wrote: (See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) Would Convergence help here? I can't see

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Yan Zhu
On Thu, Jul 25, 2013 at 12:41 PM, Ben Laurie b...@links.org wrote: On 25 July 2013 11:22, Nick liberationt...@njw.me.uk wrote: On Thu, Jul 25, 2013 at 11:19:22AM +0200, Eugen Leitl wrote: (See also https://en.wikipedia.org/wiki/Convergence_(SSL) ) Would Convergence help here? I can't see

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Andy Isaacson
On Thu, Jul 25, 2013 at 04:41:43AM -0700, Owen Barton wrote: If a government secretly aquired the SSL private keys for a site, and the site continued using them, then no convergence notary would know any cause not to vouch for the key. What helps here is perfect forward secrecy.

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Florian Weimer
Google also declined to disclose whether it had received requests for encryption keys. But a spokesperson said the company has never handed over keys to the government, Surely they have provided hard disk images containing key material to aid government investigations related to themselves or

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread John Adams
The reason why Twitter, Google, and other companies went to RC4 is because of issues with AES. The CBC and known IV attacks permitted BEAST to occur. RC4 was the safest way out. Even then, RC4 can be broken. In short, no one on the Internet is running SSL in a way that cannot be broken. Although,

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Owen Barton
On Thu, Jul 25, 2013 at 12:05 PM, Andy Isaacson a...@hexapodia.org wrote: On Thu, Jul 25, 2013 at 04:41:43AM -0700, Owen Barton wrote: If a government secretly aquired the SSL private keys for a site, and the site continued using them, then no convergence notary would know any

Re: [liberationtech] Feds put heat on Web firms for master encryption keys

2013-07-25 Thread Florian Weimer
* John Adams: The reason why Twitter, Google, and other companies went to RC4 is because of issues with AES. The CBC and known IV attacks permitted BEAST to occur. RC4 was the safest way out. Anyone who has switched to RC4 because of BEAST should seek better cryptographic advice. Seriously.