simplex
SimpleX Chat

https://github.com/simplex-chat/simplex-chat#readme

SimpleX - the first messaging platform operating without user identifiers of any kind - 100% private by design!

Public Key

npub1exv22uulqnmlluszc4yk92jhs2e5ajcs6mu3t00a6avzjcalj9csm7d828

NIP-05 Address

_@simplex.chat

NIP-57 Address

simplex@getalby.com

Profile Code

nprofile1qqsvnx99ww0sfall7gpv2jtz4ftc9v6wevgdd7g4hh7awkpfvwlezugpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3samnwvaz7tmjv4kxz7fwwdhx7un59eek7cmfv9kq7cg6l4

Publishing to

relay.damus.io

relay.snort.social

nostr.oxtr.dev

Author Public Key

npub1exv22uulqnmlluszc4yk92jhs2e5ajcs6mu3t00a6avzjcalj9csm7d828

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Last Notes

2024-08-24 12:15:01

https://securemessagingapps.com by is the great comparison of messaging apps, but there are several incorrect statements about @SimpleXChat there. Commenting in thread 🧵 below.

2024-08-20 10:48:16

Please fill this survey about SimpleX Chat: https://gdlgeuc34xt.typeform.com/to/XAKc5N1l
It is a smaller version of the survey we did last year, please answer again if you answered then.
Thank you!

2024-08-14 14:03:15

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Please upgrade desktop app to v6.0 as well.

2024-08-14 13:41:27

Announcing $1.3m pre-seed investment from @npub1sg6…f63m and
Asymmetric VC in SimpleX Chat 🚀
https://simplex.chat/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html
Also SimpleX Chat v6.0 stable is now released with the new user experience and private message routing – details in the post.

2024-08-12 18:41:39

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If any applicable legislation were to be passed, then we will be getting a legal advice based on its final wording about what is the course of action that is both legal and also benefits our users most.
At this point it would be unprofessional to speculate about it.

2024-08-12 16:24:50

In case you missed the news, #ChatControl is back on the agenda of the EU governments: https://www.patrick-breyer.de/en/take-action-to-stop-chat-control-now/
We wrote before that strong e2e encryption is the only way to protect children online: https://simplex.chat/blog/20240601-protecting-children-safety-requires-e2e-encryption.html
Write to the MPs you voted for – every single letter can change the outcome.
And huge thanks to Patrick Breyer for fighting this insanity.

2024-08-11 20:22:18

Please note: we do NOT control the domain simplexchat.org
It might be a phishing site to collect the data (it has an exact copy of our website https://simplex.chat).
We submitted the complaint to the domain registrar (GNAME).
Do NOT download anything from simplexchat.org, obviously.

2024-08-08 22:07:00

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We love Nostr as a publishing platform that offers unparalleled censorship resistance. But NIP44 does NOT provide most of the important qualities of e2e encryption:
- break-in recovery.
- repudiation (deniability).
- visibility of connection graph to observers.
- fixed message sizes (although it can be provided by the specific app)
- resistance to Shore algorithm (PQ encryption).
It's unclear whether it provides forward secrecy, but the spec implies that it does not - I might be wrong here.
We wrote this post about the qualities of e2e encryption and why they are important: https://simplex.chat/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html

2024-08-08 21:57:33

SimpleX Chat v6.0-beta.4 is released!
It is stable to use, and please let us know any issues - any help testing it is really great!
You can get beta version for iOS from Apple TestFlight, and for Android from GitHub or from our F-Droid repo (it's still in review in Play Store beta channel): https://simplex.chat/downloads/
The final release will be published on 8/14, together with the announcements.
https://m.primal.net/Jsqo.jpg

2024-06-30 13:20:30

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Because I specifically do not want to use any public currency blockchain - I want an accounting method, not money. There many useful legal differences when the flow of money is the opposite to the flow of cryptographic keys. Read the doc.

2024-06-05 12:51:04

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You’re ahead of us - thank you, reposted :)

2024-05-16 19:03:53

Communication privacy and hard product choices: https://simplex.chat/blog/20240516-simplex-redefining-privacy-hard-choices.html

2024-05-03 08:38:05

We are upgrading the preset SimpleX relays to the new version - it is compatible only with the apps starting from v5.5.3 (released early February) - please upgrade to the latest version and ask your friends to upgrade too.

2024-04-26 22:59:54

SimpleX Chat v5.7 released:
- quantum resistant e2e encryption with contacts enabled by default.
- forward messages without revealing the source and save them to private notes.
- in-call sounds and switching sound sources.
- customizable profile images - from square to circle.
- better network connection management.
Also, we added Lithuanian interface language to Android and desktop apps - thanks to our users!
Read more: https://simplex.chat/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html

2024-03-23 20:53:23

The post about SimpleX Chat v5.6 release with quantum resistant end-to-end encryption and also about how SimpleX network protocols will be moving to nonprofit governance:
https://
simplex.chat/blog/20240323-sim
plex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html
Esra'a Al Shafei has just joined SimpleX Chat team to help us deliver these goals - welcome!

2024-02-24 21:42:43

Updated "SimpleX Chat Privacy Policy and Conditions of Use"
The updated document: https://github.com/simplex-chat/simplex-chat/blob/stable/PRIVACY.md
The changes: https://github.com/simplex-chat/simplex-chat/pull/3796/files
TL;DR:
- it clarifies that we develop software for communication network, and not a communication service.
- it highlights the requirement of AGPLv3 license to publish any code modifications, and our commitment to run unmodified code.
Let us know any comments / questions!

2024-02-12 18:51:19

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Repudiation is the important quality for any private conversation - it gives digital conversation the same properties as face to face - you can plausibly deny it. And yes, non-repudiation can be added in the context where it is needed.

2024-02-07 13:06:37

Improving repudiation (deniability) in SimpleX protocols
Please send any questions/comments!
We believe that repudiation (aka deniability) is very important for communications. See this discussion with Session CTO about it, for example:
https://twitter.com/JefferysKee/status/1754336020857029013
https://twitter.com/SimpleXChat/status/1754455524068720762
https://twitter.com/JefferysKee/status/1754762787119919587
https://twitter.com/SimpleXChat/status/1754840209936543977
Currently only a part of SimpleX protocol stack provides it – client-to-client e2e encryption, that includes double ratchet (aka Signal) algorithm in one of the layers.
Client-relay protocol, on another hand, does not provide it, and as relays are chosen by the recipients, a modified relay can provide non-repudiation for sent messages, which is undesirable in the context of private communications.
We believe there should be a possibility for digital off-the-record conversations, in the same way as it is possible for in-person meetings - while recipient can keep the memory and even transcript, it should not be a strong proof to a third party.
This proposal adds repudiation to client-relay protocol by replacing cryptographic signature with authenticator (see this WIP document for the details: https://github.com/simplex-chat/simplexmq/blob/ep/cmd-auth/rfcs/2024-02-03-deniability.md).
It is already mostly implemented and will be fully rolled out by v5.7.
A more detailed post about repudiation importance and its acceptance in society and legal systems is coming.

2024-01-31 12:53:57

The comments on comparisons of SimpleX with other platforms: https://www.reddit.com/r/SimpleXChat/comments/1afgrcj/comments_on_comparisons_of_simplex_with_other/

2023-12-03 09:50:58

A talk about SimpleX Chat at BornHack 2023 conference by Peter Stuge:
https://media.ccc.de/v/bornhack2023-56143-simplex-chat-simple-m (recently uploaded)
The talk was made when v5.2 was the latest, with lots of progress since:
- local file encryption
- desktop client
- using mobile from desktop
etc.
Thank you!

2023-10-01 19:06:17

SimpleX Chat desktop for Windows is released in v5.4-beta.0!
https://github.com/simplex-chat/simplex-chat/releases/tag/v5.4.0-beta.0

2023-09-28 13:02:01

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I don’t think that marketing Session in competitor’s threads is a viable replacement for lost deniability and forward secrecy, and for the fact that whoever has passphrase can read user’s messages without them knowing. So no, I don’t think anybody needs to use session, even Signal seems a better trade off.

2023-09-25 19:59:32

SimpleX Chat v5.3 is released – with new desktop app and local file encryption!
Also in this release:
- group improvements.
- simplified incognito mode
- better app responsiveness, stability and 40% reduced memory usage.
- new privacy settings: show last messages & save draft.
Added 6 new interface languages thanks to our users - Arabic, Bulgarian, Finnish, Hebrew, Thai and Ukrainian.
Read more: https://simplex.chat/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html
Downloads page: https://simplex.chat/downloads/
#privacy #security #messenger

2023-08-19 18:16:59

SimpleX Directory Service and v5.3 public beta are released!
You can search for public groups via the experimental SimpleX Directory Service: connect to it via [this address](https://simplex.chat/contact#/?v=1-4&smp=smp%3A%2F%2Fu2dS9sG8nMNURyZwqASV4yROM28Er0luVTx5X1CsMrU%3D%40smp4.simplex.im%2FeXSPwqTkKyDO3px4fLf1wx3MvPdjdLW3%23%2F%3Fv%3D1-2%26dh%3DMCowBQYDK2VuAyEAaiv6MkMH44L2TcYrt_CsX3ZvM11WgbMEUn0hkIKTOho%253D%26srv%3Do5vmywmrnaxalvz6wi3zicyftgio6psuvyniis6gco6bp6ekl4cqj4id.onion).
Mobile apps public beta v5.3 are released:
- delivery receipts
- new layout in groups
- new UX for incognito mode
- etc.
Desktop app beta is now usable, please try it: https://github.com/simplex-chat/simplex-chat/releases/tag/v5.3.0-beta.5

2023-07-30 10:24:15

Please answer this short survey about SimpleX Chat!
https://gdlgeuc34xt.typeform.com/to/MNb0qLP9
It will take 5 minutes and will help us improve SimpleX Chat for you!
It is TypeForm – to avoid their cookies, use a private browser window.
Thank you!

2023-07-29 07:08:20

SimpleX Chat: The New Frontiers (livestream recording)
https://youtu.be/7yjQFmhAftE
- how does it work without user IDs
- desktop app demo (1:15) – you can already download beta version for Mac and Linux from GitHub
- how to set up your relay (3:51)
- how SimpleX Chat is funded (11:25)
- the problems and the future of groups (18:23)
- the demo of SimpleX Directory Service (25:20)
- Q&A (28:51)

2023-07-25 21:59:45

SimpleX Chat: New Frontiers – 7/27 at 17:00 UTC
Join us online on Thursday at 10am PT/1pm ET/6pm UK at https://stream.simplex.chat.
We will:
- demo the new desktop app.
- show how to set up SimpleX servers with dual address (public+onion).
- share the plan for SimpleX group and communities.
- possibly, show one more thing.
#OpenSource #Security #Privacy

2023-05-27 21:34:32

SimpleX Chat v5.1.2 fixing message reception bug is released to GutHub, our F-Droid and on App Store. Play Store release is in review, and the main F-Droid will be updated in a couple of days.
Thanks for the patience and sorry for the trouble!

2023-05-26 21:08:59

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Yes. I suspect that I tapped post, nothing happened, so I tapped it again, and then again :). We had it too in SimpleX Chat. Solved by blocking the button while “post”
Is processed.

2023-05-26 07:00:28

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Thanks for such a positive comment #[1] . User traffic almost tripled yesterday from your tweet, some people thought it’s your creation :)
Lots of work to do to improve it. Exciting times :)

2023-05-25 15:02:15

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Interesting idea. I think redundancy support in the client is needed to make it reliable/useful… Re any queue - any sequential transport, e.g. there is implementation that wraps SMP into WebSocket frames, we just don’t use it yet, and it’s easy to wrap in any block transport - SMP uses fixed size blocks.
Happy to brainstorm it further.

2023-03-30 18:09:44

Hello!