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Problem is not how weak or strong the encryption is

Here it’s definitely part of discussion. The context was

It’s encrypted anonymous communication capabilities.

It’s barely anonymous, and poorly encrypted. The latter is the reason Durov is in custody while Signal devs are scott free. He could easily turn illegal stuff over to French authorities, but doesn’t.

The bigger problem is that people somehow assume this a huge threat, while all previous cases didn’t involve anything like that.

There have absolutely been cases where a backdoor/weakness/lack of encryption used to catch criminals before: https://en.wikipedia.org/wiki/Operation_Trojan_Shield https://en.wikipedia.org/wiki/Ennetcom https://en.wikipedia.org/wiki/EncroChat . I distinctly remember that there were also arrests of opposition activists in Russia based on personal messages in VKontakte, but can’t find the news right now.

real criminals do their stuff everywhere (especially on telegram) for years, staying safe.

Some are staying safe, others are being caught precisely because of this.

Problem is not how weak or strong the encryption is, but that once you are under oppression and do opposition activities, you’re going to learn by yourself how to deal with it.

Using better encryption schemes is definitely part of that.

Toy may call it TLS but it’s a custom protocol.

Sure, it’s mtproto. The security it provides for non-encrypted chats (which are the absolute majority of chats) is not any different from just having TLS for transport. It’s potentially even worse as it’s not as well-audited.

Data is not kept unencrypted on their servers, according to their docs.

That just means that they store both your data in some encrypted way and the key. They can still read it trivially. You don’t even have to know the protocol to understand why: you can add new devices without having any other device online, and read all non-secret chats. It might also just mean disk encryption, in which case it’s plain-text in RAM while the server is running.

There’s user to server encryption, just not e2e.

That’s exactly what the comment said: The only encryption that applies to most chats on that platform should be transport encryption via TLS. It’s about the same level of encryption as Lemmy PMs.

The fact that Telegram doesn’t cooperate with French authorities doesn’t mean that it doesn’t cooperate with other authorities or sell your data to the highest bidder. They have all the technical means for it.

Don’t use a regular Telegram chat if your life depends on the messages being private. Use XMPP, Matrix with E2EE, or at the very least Signal. Heck, even WhatsApp is (reportedly) better, as it claims to provide E2EE and that’s been checked by some security professionals who have been given access to the source code. If you absolutely must use Telegram for something like that, only use secret chats.

Telegram is categorically less encrypted than Signal for most chats. It’s mostly the same level of security as Facebook Messenger, Instagram DMs, even Email (SMTP/IMAP over TLS) or SMS: it only encrypts communications between the client and the server. Telegram can read everything you send in regular chats. The only way to get end-to-end encryption (such that Telegram technically can’t access your communication) is by starting a fussy and inconvenient “secret chat”. It can only be done between two people (so no E2E group chats at all), only when both are online at the same time, and it only works on the devices on which the secret chat was initiated and accepted; in other words, as a frequent user I’ve only used it once for some really sensitive personal information. Even then Telegram still has access to a lot of metadata about messages: phone numbers of both parties, when the messages are sent, how big they are, etc.

I’m not saying that cooperating with intelligence/LE agencies is always an ethical, or even a good choice, but Telegram demonstrably had the ability to do so.