Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-09-05 Thread Bill Frantz
On 8/25/13 at 8:32 PM, leich...@lrw.com (Jerry Leichter) wrote: *The* biggest headache is HTTP support. Even the simplest modern HTTP server is so complex you can never be reasonably sure it's secure (though, granted, it's simpler than a browser!) You'd want to stay simple and primitive.

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-29 Thread Jerry Leichter
On Aug 28, 2013, at 11:03 AM, Jonathan Thornburg wrote: On Wed, 28 Aug 2013, Jerry Leichter wrote: On the underlying matter of changing my public key: *Why* would I have to change it? It's not, as today, because I've changed my ISP or employer or some other random bit of routing

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-29 Thread Callme Whatiwant
Hello, I'm new here, so I apologize if I'm repeating past arguments or asking old questions. On Tue, Aug 27, 2013 at 8:52 PM, Jerry Leichter leich...@lrw.com wrote: On Aug 27, 2013, at 9:48 PM, Perry E. Metzger wrote: On Tue, 27 Aug 2013 22:04:22 +0100 Wendy M. Grossman

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-29 Thread Phillip Hallam-Baker
On Thu, Aug 29, 2013 at 3:31 PM, Callme Whatiwant nejuc...@gmail.comwrote: Hello, I'm new here, so I apologize if I'm repeating past arguments or asking old questions. On Tue, Aug 27, 2013 at 8:52 PM, Jerry Leichter leich...@lrw.com wrote: On Aug 27, 2013, at 9:48 PM, Perry E. Metzger

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-29 Thread Jon Callas
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Aug 29, 2013, at 3:43 AM, Jerry Leichter leich...@lrw.com wrote: - If I need to change because the private key was compromised, there's nothing I can do about past messages; the question is what I do to minimize the number of new messages

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-28 Thread danimoth
On 27/08/13 at 10:05pm, Christian Huitema wrote: Suppose, as in Bitcoin, my email address *is* my public key You can even use some hash compression tricks so you only need 9 or 10 characters to express the address as hash of the public key. That works very well, until you have to change

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-28 Thread Jerry Leichter
On Aug 28, 2013, at 4:24 AM, danimoth wrote: On 27/08/13 at 10:05pm, Christian Huitema wrote: Suppose, as in Bitcoin, my email address *is* my public key You can even use some hash compression tricks so you only need 9 or 10 characters to express the address as hash of the public key.

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-28 Thread Jonathan Thornburg
On Wed, 28 Aug 2013, Jerry Leichter wrote: On the underlying matter of changing my public key: *Why* would I have to change it? It's not, as today, because I've changed my ISP or employer or some other random bit of routing information - presumably it's because my public key has been

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Phill
On Aug 26, 2013, at 5:27 PM, The Doctor dr...@virtadpt.net wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 08/26/2013 08:46 AM, Phillip Hallam-Baker wrote: Which is why I think Ted Lemon's idea about using Facebook type friending may be necessary. Or Gchat-style contacts.

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread ianG
On 26/08/13 08:47 AM, Richard Clayton wrote: Even without the recent uproar over email privacy, at some point, someone was going to come up with a product along the following lines: Buy a cheap, preconfigured box with an absurd amount of space (relative to the huge amounts of space, like 10GB,

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread radix42
Iang wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? tech.supp...@i.bought.your.busted.thing.com is one that comes to mind. i...@sale.me.your.thing.com is another. I think the types of prior whitelist only secure systems being discussed on-list

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Wendy M. Grossman
On 08/27/2013 18:34, ianG wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? It's clear you're not a journalist or working in any other profession where you actually need to be able to communicate spontaneously with strangers. wg --

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Greg Broiles
On Tue, Aug 27, 2013 at 2:04 PM, Wendy M. Grossman wen...@pelicancrossing.net wrote: It's clear you're not a journalist or working in any other profession where you actually need to be able to communicate spontaneously with strangers. And if the people who attacked the NY Times' DNS today

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Phillip Hallam-Baker
On Tue, Aug 27, 2013 at 5:04 PM, Wendy M. Grossman wen...@pelicancrossing.net wrote: On 08/27/2013 18:34, ianG wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? It's clear you're not a journalist or working in any other profession where you

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread radix42
Phillip Hallam-Baker wrote: One hypothesis that I would like to throw out is that there is no point in accepting encrypted email from someone who does not have a key to encrypt the response. I'd agree, as I was in just this position in the last week or so: I got a gpg encryped email from

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Perry E. Metzger
On Tue, 27 Aug 2013 21:33:01 + radi...@gmail.com wrote: Iang wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? tech.supp...@i.bought.your.busted.thing.com is one that comes to mind. i...@sale.me.your.thing.com is another. I think the types of

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Perry E. Metzger
On Tue, 27 Aug 2013 22:04:22 +0100 Wendy M. Grossman wen...@pelicancrossing.net wrote: On 08/27/2013 18:34, ianG wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? It's clear you're not a journalist or working in any other profession where you

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Peter Saint-Andre
On 8/27/13 7:48 PM, Perry E. Metzger wrote: On Tue, 27 Aug 2013 22:04:22 +0100 Wendy M. Grossman wen...@pelicancrossing.net wrote: On 08/27/2013 18:34, ianG wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? It's clear you're not a journalist or

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Peter Saint-Andre
On 8/27/13 7:45 PM, Perry E. Metzger wrote: On Tue, 27 Aug 2013 21:33:01 + radi...@gmail.com wrote: Iang wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? tech.supp...@i.bought.your.busted.thing.com is one that comes to mind.

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Jerry Leichter
On Aug 27, 2013, at 9:48 PM, Perry E. Metzger wrote: On Tue, 27 Aug 2013 22:04:22 +0100 Wendy M. Grossman wen...@pelicancrossing.net wrote: On 08/27/2013 18:34, ianG wrote: Why do we need the 1980s assumption of being able to send freely to everyone, anyway? It's clear you're not a

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-27 Thread Christian Huitema
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Suppose, as in Bitcoin, my email address *is* my public key You can even use some hash compression tricks so you only need 9 or 10 characters to express the address as hash of the public key. That works very well, until you have to change the

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Richard Clayton
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 In message fdd34a58-6ce6-497a-a177-b940d36d0...@lrw.com, Jerry Leichter leich...@lrw.com writes On the flip side, mail systems like gMail or Yahoo mail are complex and difficult to run *exactly because they are immense*. The mail systems part is

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Perry E. Metzger
On Mon, 26 Aug 2013 06:47:49 +0100 Richard Clayton rich...@highwayman.com wrote: If you run your own emails system then you'll rapidly find out what 2013's spam / malware problem looks like. This is slightly off topic, but... As it happens, I run my own email system (and run email for a few

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Moritz
Hi, On 26.08.2013 00:28, Perry E. Metzger wrote: We probably don't want any sort of central service running this network that could be easily disrupted, so identifier to IP address information should probably be stored in some big honking DHT, signed in the ID's key. Access to the DHT

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Jerry Leichter
On Aug 26, 2013, at 10:14 AM, Perry E. Metzger pe...@piermont.com wrote: On Mon, 26 Aug 2013 06:47:49 +0100 Richard Clayton rich...@highwayman.com wrote: If you run your own emails system then you'll rapidly find out what 2013's spam / malware problem looks like. This is slightly off

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Ray Dillinger
On 08/25/2013 03:28 PM, Perry E. Metzger wrote: So, imagine that we have the situation described by part 1 (some universal system for mapping name@domain type identifiers into keys with reasonable trust) and part 2 (most users having some sort of long lived $40 device attached to their home

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Ray Dillinger
On 08/25/2013 08:32 PM, Jerry Leichter wrote: Where mail servers have gotten into trouble is when they've tried to provide additional services - e.g., virus scanners, which then try to look inside of complex formats like zip files. This is exactly the kind of thing you want to avoid - another

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Perry E. Metzger
On Mon, 26 Aug 2013 10:40:17 -0700 Ray Dillinger b...@sonic.net wrote: On 08/25/2013 03:28 PM, Perry E. Metzger wrote: So, imagine that we have the situation described by part 1 (some universal system for mapping name@domain type identifiers into keys with reasonable trust) and part 2

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Eugen Leitl
On Mon, Aug 26, 2013 at 02:44:32PM -0400, Perry E. Metzger wrote: My main issue with this proposal is that somebody identifiable is going to manufacture these boxes. Maybe several somebodies, but IMO, that's an identifiable central point of control/failure. Recently there's a trend for at

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread The Doctor
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 08/26/2013 08:46 AM, Phillip Hallam-Baker wrote: Which is why I think Ted Lemon's idea about using Facebook type friending may be necessary. Or Gchat-style contacts. I don't think we can rely on that for Key distribution. But I think it

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-26 Thread Peter Saint-Andre
On 8/26/13 8:14 AM, Perry E. Metzger wrote: there is a good reason that I proposed that in the long run, whitelist only systems like Jabber and Facebook messaging are a better model. As one of those Jabber guys, I agree. :-) Perry, thanks for starting some very interesting threads here --

[Cryptography] Email and IM are ideal candidates for mix networks

2013-08-25 Thread Perry E. Metzger
[Third in an ongoing series. Disclaimer yet again: I make few claims of the contents here being specifically original to me. Mix networks and the like have been discussed forever, and I'm sure others have been having similar thoughts to this of late.] The aim of the Tor network (which, it should

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-25 Thread Christian Huitema
I think we can agree that the first step is to deploy home servers, and that the first application there would to host communication applications. Just doing that without much other change would already provide protection against the silent spying that goes on in big cloud servers. Initial

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-25 Thread Perry E. Metzger
On Sun, 25 Aug 2013 16:04:59 -0700 Christian Huitema huit...@huitema.net wrote: I think we can agree that the first step is to deploy home servers, and that the first application there would to host communication applications. Just doing that without much other change would already provide

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-25 Thread Jerry Leichter
On Aug 25, 2013, at 6:28 PM, Perry E. Metzger wrote: [Commenting on just one minor piece] ...Similar techniques may be useful for voice traffic, but that has interesting latency requirements, and they're hard to fulfill with a mix network that might take arbitrary time. There's been some

Re: [Cryptography] Email and IM are ideal candidates for mix networks

2013-08-25 Thread Jerry Leichter
On Aug 25, 2013, at 7:04 PM, Christian Huitema wrote: I think we can agree that the first step is to deploy home servers, and that the first application there would to host communication applications. Just doing that without much other change would already provide protection against the