IMO, if/when Autocrypt v2 is implemented, Signal, SimpleX, and Delta Chat will all essentially be first-class secure messengers, in the sense that: 1. each one has a clear & _distinct_ target demographic and use-case 2. there will be only _deliberate_ tradeoffs between them, not omissions of important security features. (Session and Threema both fail point #1 because Session is a worse SimpleX and Threema is a worse Signal.) Delta Chat I think is interesting because it (again with a _future_ PFS/PQC update) seems to approach the confidentiality properties of Signal and SimpleX without relying on something like Signal’s centralized infrastructure or SimpleX’s considerably more complicated routing architecture. The biggest concern I have with SimpleX is that despite the decentralized model I do not see how it could continue to exist without SimpleX _the company_ behind it. Essentially all of the complexity of SimpleX is placed upon the client, to achieve important privacy properties (absolutely minimizing the metadata the servers get) at the expense of being a Usually where federated projects shine is decentralization of the project as a whole, because different aspects of the project are delegated more appropriately. If I want to develop a Delta Chat client I don’t need to understand and implement server-side things like intra-server routing etc., and vice-versa. And if I am a _user_ of the messaging service I do not need to be responsible for every aspect of my experience: I think this is where a lot of people stop using SimpleX because having the client itself do everything comes with a lot of UX problems that tend to drive people to Signal. Anyways, it is basically the classic **Centralized** (Signal) <> **Federated** (Delta) <> **Decentralized** (SimpleX) spectrum we always end up seeing in pretty much any field, with the same benefits and tradeoffs these architectures always have. Like with Twitter/Mastodon/Nostr, or Dropbox/Nextcloud/Syncthing, etc.

IMO, if/when Autocrypt v2 is implemented, Signal, SimpleX, and Delta Chat will all essentially be first-class secure messengers, in the sense that: 1. each one has a clear & _distinct_ target demographic and use-case 2. there will be only _deliberate_ tradeoffs between them, not omissions of important security features. (Session and Threema both fail point #1 because Session is a worse SimpleX and Threema is a worse Signal.) Delta Chat I think is interesting because it (again with a _future_ PFS/PQC update) seems to approach the confidentiality properties of Signal and SimpleX without relying on something like Signal’s centralized infrastructure or SimpleX’s considerably more complicated routing architecture. The biggest concern I have with SimpleX is that despite the decentralized model I do not see how it could continue to exist without SimpleX _the company_ behind it. Essentially all of the complexity of SimpleX is placed upon the client, to achieve important privacy properties (absolutely minimizing the metadata the servers get) at the expense of being a Usually where federated projects shine is decentralization of the project as a whole, because different aspects of the project are delegated more appropriately. If I want to develop a Delta Chat client I don’t need to understand and implement server-side things like intra-server routing etc., and vice-versa. And if I am a _user_ of the messaging service I do not need to be responsible for every aspect of my experience: I think this is where a lot of people stop using SimpleX because having the client itself do everything comes with a lot of UX problems that tend to drive people to Signal. Anyways, it is basically the classic **Centralized** (Signal) <> **Federated** (Delta) <> **Decentralized** (SimpleX) spectrum we always end up seeing in pretty much any field, with the same benefits and tradeoffs these architectures always have. Like with Twitter/Mastodon/Nostr, or Dropbox/Nextcloud/Syncthing, etc.

Decentralized private messenger using email infrastructure for secure, end-to-end encrypted communication.

AUTOCRYPT's Red Team took first place at DEF CON 34's Car Hacking Village CTF, showcasing their advanced automotive cybersecurity. Discover their innovative approach.

83チームが参加、開始から約25時間で全課題を解決～ AUTOCRYPT Co., Ltd.のプレスリリース 自動車・モビリティ領域を中心に、フィジカルAI時代を見据えたサイバーセキュリティソリューションを手掛けるアウト ...

AUTOCRYPT clinches first place at DEF CON 34's Automotive Hacking Competition, showcasing the integration of human and AI expertise in cybersecurity.

Versie 12.3 van de e-mailclient The Bat! is uitgekomen. Het programma heeft alles wat je van een e-mailclient mag verwachten, zoals het automatisch kunnen sorteren, beantwoorden of doorsturen van e-mail en het met vertraging kunnen versturen van e-mails. Er zijn diverse e-mailthema's, waarbij ook van macro's gebruikgemaakt kan worden. In deze uitgave zijn de volgende veranderingen en verbeteringen doorgevoerd: Autocrypt Easy End-to-End Encryption in The Bat! v12.3

Modern OpenPGP v6 certificate with post-quantum cryptography, reliable deletion, and transport-agnostic messaging for decentralized systems.

Autocrypt v2 has been released. It combines post-quantum cryptography (ML-KEM-768) with reliable deletion (clock-time based), achieving forward secrecy without synchronization. Based on OpenPGP v6, th

Modern OpenPGP v6 certificate with post-quantum cryptography, reliable deletion, and transport-agnostic messaging for decentralized systems.

Modern OpenPGP v6 certificate with post-quantum cryptography, reliable deletion, and transport-agnostic messaging for decentralized systems.

AUTOCRYPT recently showcased its Digital Key Self-Testing Toolkit designed for automotive solutions. This kit enhances pre-production validation processes for OEMs and Tier suppliers, ensuring interoperability and reducing risks.

AUTOCRYPT has formed a strategic alliance with Elektrobit, aiming to bolster automotive cybersecurity. This partnership enhances their offerings in South Korea's evolving vehicle software landscape.

AUTOCRYPT proudly announces its V2X Public Key Infrastructure (PKI) has been awarded WebTrust certification, affirming its security and operational standards.

AUTOCRYPT's Automotive Key Management Initiative earns a shortlisting for the Cybersecurity Excellence Award at AutoTech 2026, reflecting its innovation.

Сабж такий, що я довго не можу знайти заміни Gmail: то потрібен номер телефону, то інша скринька, то апрув. Мені це набридло і я згадав про безкоштовні сервери SMTP від DeltaChat. Чим вони зручні - що видають "одноразові" хешовані адреси email, які л...

It sounds to me like once they implement Autocrypt v2, Delta Chat will be pretty competitive with Signal (and Threema I think, although I don’t know very much about that one) for 1:1 and smaller group chats. The main thing that would be missing is their take on Sealed Sender. There’s some other problems they need to work on eventually too like group management for big groups, but they’re more usability issues. It’s also had fewer serious bugs IME than SimpleX and Session.