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If you want to dive deep into guaranteed end-to-end encryption and how green checkmarks protect against compromised servers ("MITM attacks"), the "Cryptographic Analysis of Delta Chat" from Applied Cryptography researchers at ETH Zuerich has been published at https://eprint.iacr.org/2024/918.pdf -- earlier this year we had blogged from our side how we addressed all findings https://delta.chat/en/2024-03-25-crypto-analysis-securejoin

#securejoin #deltachat


Delta Chat: Hardening Guaranteed End-to-End encryption based on a security analysis from ETH researchers

We released guaranteed end-to-end encryption in November 2023 and were in for a pleasant surprise three months later. The Applied Cryptography Group at ETH Zurich handed us a cryptographic security...
delta.chat
#deltachat #securejoin
in reply to Delta Chat

Kevin Karhan :verified:
Kevin Karhan :verified:
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TBH, I think that #deltaChat, alongside @monocles / #monoclesChat is one of the few real #E2EE #Chat & #Messaging solutions (which allow for full #SelfCustody of keys as well as being based on #OpenStandards for a #MultiVendor & #MultiProvider ecosystem) and even out-of-band verification and key exchange...

  • The main difference is that deltaChat implements #PGP/MIME on #IMAP+#SMTP, which may be easier to setup in some cases and also offer an easy pipeline to archival requirements in #business setups whilst #monocles chat uses #XMPP+#OMEMO first and supports PGP/MIME as a secondary option, making it a good option in individual setups...

Needless to say both support using @torproject / #Tor via #Orbot and thus connecting to an #OnionService or just anonymously connecting to the server one personally chooses...

  • So unless a provider explicitly bans Tor proactively, they'll work just fine.

The advantage of XMPP is that it also allows for calls, whereas I've to see how one can do Group Chats on deltaChat at all...

#business #xmpp #chat #Tor #deltachat #e2ee #messaging #smtp #openstandards #orbot #pgp #imap #omemo #selfcustody #monocleschat #monocles #multivendor #multiprovider #onionservice @The Tor Project @monocles
in reply to Kevin Karhan :verified:

Delta Chat
Delta Chat
• •
@kkarhan @monocles @torproject For calls, you can take a look at https://delta.chat/en/help#how-can-i-use-audiovideo-calls-with-delta-chat

Delta Chat: FAQ

What is Delta Chat? Delta Chat is a reliable, decentralized and secure messaging app, available for mobile and desktop platforms. Delta Chat feels like Whatsapp or Telegram but you can also use and...
delta.chat
@The Tor Project @monocles @Kevin Karhan :verified:
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