this post was submitted on 29 Jan 2025
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Asklemmy
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I can't speak about telegram, but signal is absolutely not secure to use. Its a US-based service (that must adhere to NSLs), and requires phone numbers (meaning your real identity in the US).
Matrix, XMPP, or SimpleX are all decentralized, and don't require US hosting.
As you say yourself (cryptocraphic nerd here):
So a shame there are no free servers, are the server soft not open source, only the signal app itself?
The server is supposedly open source, but they did anger the open source community a few years back, by going a whole year without posting any code updates. Either way that's not reliable, because signal isn't self-hostable, so you have no idea what code the server is running. Never rely on someone saying "just trust us."
Signal has posted multiple times about their use of SGX Secure Enclaves and how you can use Remote Attestation techniques to verify a subset of the code that’s running on their server, which directly contradicts your claim. (It doesn’t contradict the claim that you cannot verify all the code their server is running, though.) Have you looked into that? What issues did you find with it?
I posted a comment here going into more detail about it, but I haven’t personally confirmed myself that it’s feasible.