The downside of our project approach was that we often got experts being very dismissive on re-using email and #OpenPGP ... and there still is some opposition which often subsides when actually trying #deltachat and #chatmail, looking at security audits and our strong usable security focus. There may also be surprising upsides. The UK "Online Safety Bill" which attacks end-to-end encryption integrity seems to not apply for ... e-mail. Because everyone knows, e-mail is unencrypted, right? :)

Decentralizers, attention! :) Last #deltachat releases introduced stable #p2p group membership not found in any other messenger. Members can add/remove peers also while being offline, and when everything comes online again, everyone has the same consistent membership view. We formalized and ran a simulation model using #TLA+ (invented by Leslie Lamport of vector clock fame):

GitHub

models/group-membership at main · chatmail/models

Formal specifications for chatmail. Contribute to chatmail/models development by creating an account on GitHub.

and a complementary #pytest model with more corner cases tested here:

GitHub

models/gmc/test_gmc.py at main · chatmail/models

Formal specifications for chatmail. Contribute to chatmail/models development by creating an account on GitHub.

With #deltachat #chatmail and #webxdc developments we aim to instigate a new modern foundation for secure E-Mail and a resilient Web without platforms. We are building a kind of #minecraft system for modern decentralized messaging. But who are we building it for? For all who need reliable trustable means of modern private communication. While our work needs hackers and experts it's not designed for them. @npub1j8vy...ld5q raises interesting and important related thoughts

Smashing Frames

Who is Free Software for?

For a while I have been arguing that maybe there are some issues with the whole “Open*” movements, their founding myths and ideologies ...

Ah, it's #WhatsAppDown time of the year again we hear? :)

Did you know that #deltachat literally shares cryptographic implementation code with #signal ? Both delta and signal use the ed25519-dalek crate ... Most messengers by now moved their cryptography to #rustlang . We did that in 2019. But in delta also all networking and message formats is implemented in Rust where other messengers (including signal) have a lot of platform specific code still.

Woah! You can now run 32bit operating systems (alpine, ReactOS, ...) via the new v86emu #webxdc app available at

webxdc apps

Ethernet networking uses "webxdc realtime API" implemented via @npub1pez7...6yrq gossip channels. Basically VMs are wired to an Ethernet that is constrained to chat members only and uses forward-secret encryption with #p2p connections. Result: Telnet and netcat are similarly secure as signal but with Peer-to-peer networking :)

10 Million push notifications for #chatmail messages were delivered in the last 30 days, up from 3 Million half a year ago. F-droid installs do not use push notifications, and classic e-mail users also do not use push notifications. These usages are therefore not contained in the number which therefore marks a lower bound on number of messages delivered. For more info on push notifications and instant message delivery, and also on privacy and security concerns, see

Delta Chat: FAQ

What is Delta Chat? Delta Chat is a reliable, decentralized and secure instant messaging app, available for mobile and desktop platforms. Instant c...

#deltachat is a minority messenger today and that's just fine for now. Changes often come from the precarious fringe which has to make ends meet, under hostile circumstances. Our approaches are aiming to provide working software that does its damn job. No unable to decrypt, no going for VC/Blockchain money, no bending the knee and no endorsing of corporate platforms. The #chatmail server network implements #interoperable #cryptography , does away with shady spam lists, catering for #Gmail etc