tedks 191 days ago link
Why is it so hard? It doesn work where A simply OTR encrypts her message to the keys of B, C, D and broadcasts them together? Or is it more of a problem where the continuous key re negotiation is hard?
Yes, but then Caesar would have to trust Alice to relay Bob (which could be a fine and pragmatic solution for some use cases, but wouldn really be "otr for workgroups"). It would also suffer from poor network topology which could be a problem for large chats and high bandwith (and low latency) chats (file transfer, audio chat).
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it essentially transport transparent like otr that fabolous! Would it be useful for email as well?
e12e 191 days ago link
But since I got a traffic flat obviously I prefer to send messages over the internet. I used WhatsApp in the past, and it really was a great replacement for SMS. So you can use TOR to hide your identity. Since it using SMS you can deny you ever talked to someone. But I don trust my crypto skills. I could never design a secure protocol from scratch. So PLEASE create libraries regular devs can use to make the world a better place. (OTR does this! At least I would think I do have enough knowledge to use libotr correctly.)Edit: Looking at the TextSecure code there is Push Notification stuff. So does this use SMS Valentino Flats Black
cypherpunks01 191 days ago link
Let say Alice, Bob, Caesar and Dolores want to communicate. Couldn Alice just open a 1 on 1 chat with Bob, then with Caesar, and then a third one with Dolores. And couldn she then just copy and paste her message to all of them at the same time? And couldn this be automated?
When I saw this I really hoped I would click the link and it would say there that OTRv3 supports group chats now.
This OTRv3 document has been available since at least 2012(?), so I not sure why there a sudden interest in discussing it, but here was our analysis of OTRv3 at Open Whisper Systems:1) The introduction of SIGMA in the switch from OTRv1 to OTRv2 significantly reduced the "deniability" properties of OTR. The protocol does some explicit things to provide "full" deniability, but in OTRv3 only people who actually had a conversation with Alice can produce a complete forged transcript Ysl Sandals with Alice. More details: High Heels Shoes Green
lawl 191 days ago link
https: OTRv3 doesn work in asynchronous environments. It depends on a reliable and synchronous transport that delivers messages in order. The messaging landscape is increasingly asynchronous, so OTRv3 is a difficult fit for modern messaging protocols. More details: https: The OTRv3 "ratcheting" protocol is slow. It uses what we refer to as a "three step ratchet," which provides less than ideal forward secrecy and "future secrecy" semantics. While as far as I know your stuff is pretty much baked in your products. I heard of TextSecure and looked at it, but I never bothered to try it. Because it only seems to work with SMS and MMS (at least that what it advertizes). Now in Switzerland we have the situation that a single SMS costs still about 10 cents (in USD and CHF).
I guessing they want to set up a single session key, maintain deniability as well as authentication, and avoid leaks of the key when someone leaves the chat. Perhaps demand some form of indication from the user agent that clearly show group chat and individual chat is different?As for "just broadcast multiple copies" that also depends on use case. 100 person chat room? 10 person video conference? 10 bandwidth might not be the best approach.
or a messaging server on the interwebs? I actually confused now.
Oh, shiny! It been a while since I looked at ts (a previous early version had some issues on my previous phone). If you doing some work on the protocol level, especially if High Heels Shoes Kids
e12e 191 days ago link
Sadly that is not the case. There are a whole bunch of people working on this, and it not hard to find draft specs, but they are drafts; doing the crypto right for this is a really hard problem.
im3w1l 191 days ago link
e12e 191 days ago link
Moxie is only one person, and the TextSecure team beyond him is pretty small, and they focusing on a lot of things now. It is extremely verbose and the extension that would make it tolerable to use with unstable internet connection and multiple clients are not supported by enough clients and servers. Also it misses an encryption standard for asynchronous communication. And again I think OTR is not a good basis for that. Transparently. :)
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