SimpleX said at https://simplex.chat/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html#end-to-end-encryption-security-attacks-and-defense : “SimpleX Chat does not use signature in any part of client-client protocol, but the signature is currently used when author…

[image] glido000: IRL deniability/repudiation is just marketing slogan. [image] SYST3M_D3STR0YER: So I can just solve this question with „No messenger has the feature of plausibly denying messages“? This I believe is the current situation for all messaging apps I know of, for better or…

You are thinking of cryptographic deniability but there is also plausible deniability to consider. You may be interested in this post about deniability. [image] Messenger choice For plausible deniability to exist, the official clients of Signal, Session, SimpleX etc could add something like the …

It was never implemented? So does that you can‘t deny any message plausibly?

[image] SYST3M_D3STR0YER: “SimpleX Chat does not use signature in any part of client-client protocol, Lol, I thought that they use a scheme where they release the key used to sign the previous message in the next one, but that the use message signing. If they don’t use any message signing, h…

They use signatures, but only in authorizing the message to the server.

Reading the Simplex documentation, especially: protocol/overview-tjr.md 8fdc0703b Revision 2, 2024-06-22 Evgeny Poberezkin # SimpleX: messaging and application platform ## Table of contents - [Introduction](#introduction) - [What is SimpleX](#what-is-simplex) - [SimpleX…

Yes, AFAIK Session never implemented what they suggested. Any messaging service that doesn’t allow easy editing of other users’ messages arguably doesn’t have plausible deniability. An edit feature built into an official client would create the possibility that the chat history may have been tamper…

IRL deniability/repudiation is just marketing slogan. [image] Messenger choice person_raising_handQuestions It’s time to grow up. Deniability, Forward Secrecy are things which can be discussed on the forum. In the Court it does not matter. wink Have you hear…

So I can just solve this question with „No messenger has the feature of plausibly denying messages“?

[image] beantaco: Any messaging service that doesn’t allow easy editing of other users’ messages arguably doesn’t have plausible deniability. An edit feature built into an official client would create the possibility that the chat history may have been tampered with. I guess it was SimpleX th…

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Does SimpleX ACTUALLY have Deniability / Repudiaton?

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glido000 February 8, 2026, 11:01am 8

IRL deniability/repudiation is just marketing slogan.

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Does SimpleX ACTUALLY have Deniability / Repudiaton?

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