Re: [cryptography] airgaps in CAs

2011-12-09 Thread Adam Back
Hi Arshad Do the air gapped private PKI root certs (and if applicable their non-airgapped sub-CA certs they authorize) have the critical name constraint extension eg .foocorp.com meaning it is only valid for creating certs for *.foocorp.com? (I am presuming these private PKI certs are sub-CA

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Jon Callas
On 8 Dec, 2011, at 8:27 PM, Peter Gutmann wrote: In any case getting signing certs really isn't hard at all. I once managed it in under a minute (knowing which Google search term to enter to find caches of Zeus stolen keys helps :-). That's as an outsider, if you're working inside

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Thor Lancelot Simon
On Fri, Dec 09, 2011 at 01:01:05PM -0800, Jon Callas wrote: If you have a certificate issue a revocation for itself, there is an obvious, correct interpretation. That interpretation is what Michael Heyman said, and what OpenPGP does. That certificate is revoked and any subordinate

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Steven Bellovin
On Dec 9, 2011, at 3:46 18PM, Jon Callas wrote: On 8 Dec, 2011, at 8:27 PM, Peter Gutmann wrote: In any case getting signing certs really isn't hard at all. I once managed it in under a minute (knowing which Google search term to enter to find caches of Zeus stolen keys helps :-).

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Nico Williams
On Fri, Dec 9, 2011 at 4:08 PM, Steven Bellovin s...@cs.columbia.edu wrote: On Dec 9, 2011, at 3:46 18PM, Jon Callas wrote: If it were hard to get signing certs, then we as a community of developers would demonize the practice as having to get a license to code. Peter is talking about stolen

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Randall Webmail
From: Nico Williams n...@cryptonector.com What should matter is that malware should not be able to gain control of the device or other user/app data on that device, and, perhaps, that the user not even get a chance to install said malware, not because the malware's signatures don't chain up to a

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Jeffrey Walton
On Fri, Dec 9, 2011 at 5:28 PM, Nico Williams n...@cryptonector.com wrote: On Fri, Dec 9, 2011 at 4:08 PM, Steven Bellovin s...@cs.columbia.edu wrote: On Dec 9, 2011, at 3:46 18PM, Jon Callas wrote: If it were hard to get signing certs, then we as a community of developers would demonize the

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Steven Bellovin
On Dec 9, 2011, at 5:41 04PM, Randall Webmail wrote: From: Nico Williams n...@cryptonector.com What should matter is that malware should not be able to gain control of the device or other user/app data on that device, and, perhaps, that the user not even get a chance to install said

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Nico Williams
On Fri, Dec 9, 2011 at 4:41 PM, Jeffrey Walton noloa...@gmail.com wrote: This strengthens the argument for digital signatures as a means of providing upgrade continuity and related application grouping / isolation, as in the Android model.  No need for a PKI then, no need to pay for

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Jeffrey Walton
On Fri, Dec 9, 2011 at 6:00 PM, Nico Williams n...@cryptonector.com wrote: On Fri, Dec 9, 2011 at 4:41 PM, Jeffrey Walton noloa...@gmail.com wrote: This strengthens the argument for digital signatures as a means of providing upgrade continuity and related application grouping / isolation, as

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread dan
If the USG can't even keep thumb drives off of SIPR, isn't the whole game doomed to failure? (What genius thought it would be a good idea to put USB ports on SIPR-connected boxes, anyway?) USG is, like all enterprises, struggling with consumerization such as whether cloud services

Re: [cryptography] How are expired code-signing certs revoked?

2011-12-09 Thread Peter Gutmann
Jon Callas j...@callas.org writes: If it were hard to get signing certs, then we as a community of developers would demonize the practice as having to get a license to code. WHQL is a good analogy for the situations with certificates, it has to be made inclusive enough that people aren't