Merge pull request #109 from ltGuillaume/main

Replace OTR with XMPP clients with OMEMO (#94)

README.md

@@ -235,7 +235,7 @@ Without using a secure app for instant messaging, all your conversations, meta d
 **[Signal](https://signal.org/)** | Probably one of the most popular, secure private messaging apps that combines strong encryption (see [Signal Protocol](https://en.wikipedia.org/wiki/Signal_Protocol)) with a simple UI and plenty of features. It's widely used across the world, and easy-to-use, functioning similar to WhatsApp - with instant messaging, read-receipts, support for media attachments and allows for high-quality voice and video calls. It's cross-platform, open-source and totally free. Signal is [recommended](https://twitter.com/Snowden/status/661313394906161152) by Edward Snowden, and is a perfect solution for most users
 **[Session](https://getsession.org)** | Session is a fork of Signal, however unlike Signal it does not require a mobile number (or any other personal data) to register, instead each user is identified by a public key. It is also decentralized, with servers being run by the community though [Loki Net](https://loki.network), messages are encrypted and routed through several of these nodes. All communications are E2E encrypted, and there is no meta data.
 **[Silence](https://silence.im/)** | If you're restricted to only sending SMS/MMS, then Silence makes it easy to encrypt messages between 2 devices. This is important since traditional text messaging is inherently insecure. It's easy-to-use, reliable and secure - but has fallen in popularity, now that internet-based messaging is often faster and more flexible
-**[Off-The-Record](https://otr.cypherpunks.ca/)** | Off-the-Record (OTR) Messaging allows you to have private conversations over instant messaging/ [XMPP](https://xmpp.org). It has fallen in popularity in recent years, in favor for simpler, mobile-based messaging apps, but still widely used and secure. It provides: Encryption (so no one else can read your messages), Authentication (assurance that the correspondent is who you think they are), Deniability (After a conversation, it cannot be proved you took part), Perfect Forwards Secrecy (if your keys are compromised, no previous messages can be decrypted). The easiest way to use OTR, is with a [plugin](https://otr.cypherpunks.ca/software.php) for your IM client
+**[XMPP](https://xmpp.org/)** | XMPP, also known as Jabber, is an open standard for decentralized messaging that has been widely used for decades. It has actually been the basis upon which WhatsApp, Facebook's Chat and Google's Talk were built, but these companies (eventually) chose to remove the interoperability with other servers. Prominent XMPP clients support [OMEMO end-to-end encryption](https://en.wikipedia.org/wiki/OMEMO), which is based on the [Double Ratchet Algorithm](https://en.wikipedia.org/wiki/Double_Ratchet_Algorithm) that is used in Signal. For more hands-on information and to register an account you can visit [JoinJabber](https://joinjabber.org). Below you can find a list of OMEMO-enabled clients for all the major platforms.<br><br><table><thead><tr><th>Program</th><th>Linux</th><th>MacOS</th><th>Windows</th><th>Android</th><th>iOS</th></tr></thead><tbody><tr><td><a href="https://gajim.org">Gajim</a> (<a href="https://gajim.org/download/#install-instructions">OMEMO plugin</a>)</td><td>✓</td><td><a href="https://dev.gajim.org/gajim/gajim/-/wikis/help/Gajim-on-macOS">~</a></td><td>✓</td><td></td><td></td></tr><tr><td><a href="https://dino.im">Dino</a> ✆</td><td>✓</td><td></td><td><a href="https://github.com/LAGonauta/dino/releases">✓</a></td><td></td><td></td></tr><tr><td><a href="https://conversations.im">Conversations</a> / <a href="https://blabber.im">Blabber</a> ✆</td><td></td><td></td><td></td><td>✓</td><td></td></tr><tr><td><a href="https://monal-im.org">Monal IM</a></td><td></td><td>✓</td><td></td><td></td><td>✓</td></tr><tr><td><a href="https://beagle.im">Beagle IM</a> / <a href="https://siskin.im">Siskin IM</a> ✆</td><td></td><td>✓</td><td></td><td></td><td>✓</td></tr></tbody></table>
 
 #### Other Notable Mentions
 Other private, encrypted and open source messaging apps include: [Surespot](https://www.surespot.me), [Chat Secure](https://chatsecure.org/) (iOS only) and [Status](https://status.im/). Note that [Tor Messenger](https://blog.torproject.org/category/tags/tor-messenger)s been removed from the list, since development has halted.