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. I

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 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 that will arrive

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 wrote: > 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 wrote: > > > > On Aug 27, 2013, at 9:48 PM, Perry E. Metzger wrote: > > > >> On Tue, 27 A

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 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" >> wrote: >>> On 08/27/2013 18

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 info

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 comp

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

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

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 pub

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" > 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 wo

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

2013-08-27 Thread Perry E. Metzger
On Wed, 28 Aug 2013 03:04:25 +0100 "Wendy M. Grossman" wrote: > On 08/28/2013 02:48, Perry E. Metzger wrote: > > Of course, as a reporter, you are probably getting email > > addresses of people to talk to via referral, and that could be > > used to get past the barrier. The problem of people spont

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

2013-08-27 Thread Wendy M. Grossman
On 08/28/2013 02:48, Perry E. Metzger wrote: > Of course, as a reporter, you are probably getting email addresses of > people to talk to via referral, and that could be used to get past the > barrier. The problem of people spontaneously contacting a published > address is harder. I do the latter a

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 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" > 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

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" 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 actually need to be

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

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 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

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 to

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 -- www.pelicancrossi

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 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

2013-08-26 Thread Phill
On Aug 26, 2013, at 5:27 PM, The Doctor 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. > >> I do

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 --

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 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 f

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 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 (most user

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 p

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 netw

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

2013-08-26 Thread Phillip Hallam-Baker
On Mon, Aug 26, 2013 at 1:47 AM, Richard Clayton wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > In message , Jerry Leichter > 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 syst

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 wrote: > On Mon, 26 Aug 2013 06:47:49 +0100 Richard Clayton > 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 ru

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 prob

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 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 other people at the sam

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

2013-08-25 Thread Richard Clayton
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 In message , Jerry Leichter 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 really rather simple... and pretty much looks after itself. T

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 "

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 Perry E. Metzger
On Sun, 25 Aug 2013 16:04:59 -0700 "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 again

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 depl

[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 b