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Is Telegram really an encrypted messaging app?

blog.cryptographyengineering.com

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Re: Is Telegram really an encrypted messaging app?

#591
post #579

Earlier quoted context omitted.

> How would you securely sync plaintext messages? Same as with private keys: Verified e2ee > Telegram supports e2ee but it is device centric for this reason At least this is what they told you

> Same as with private keys: Verified e2ee Yikes

Anything meaningful to say?

Re: Is Telegram really an encrypted messaging app?

#593
>Does Telegram have encryption or doesn’t it?

>Many systems use encryption in some way or another. However, when we talk about encryption in the context of modern private messaging services, the word typically has a very specific meaning: it refers to the use of default end-to-end encryption to protect users’ message content. When used in an industry-standard way, this feature ensures that every message will be encrypted using encryption keys that are only known to the communicating parties, and not to the service provider.

>From your perspective as a user, an “encrypted messenger” ensures that each time you start a conversation, your messages will only be readable by the folks you intend to speak with. If the operator of a messaging service tries to view the content of your messages, all they’ll see is useless encrypted junk. That same guarantee holds for anyone who might hack into the provider’s servers, and also, for better or for worse, to law enforcement agencies that serve providers with a subpoena.

>Telegram clearly fails to meet this stronger definition for a simple reason: it does not end-to-end encrypt conversations by default. If you want to use end-to-end encryption in Telegram, you must manually activate an optional end-to-end encryption feature called “Secret Chats” for every single private conversation you want to have. The feature is explicitly not turned on for the vast majority of conversations, and is only available for one-on-one conversations, and never for group chats with more than two people in them.

Re: Is Telegram really an encrypted messaging app?

#594

Earlier quoted context omitted.

While this is a well-trodden stereotype, and it certainly has merit, not all crimes are Snowden-level crimes against the state. Felonies such as embezzlement, fraud and trafficking are often investigated by exposing the digital trail. Law enforcement most definitely do pull those records with a subpoena. It's often one of the first things done (pull all banking and phone records) and is often a key ingredient in a su…

If I'm not mistaken you can buy a special 888 number which works only for telegram from telegram

Ah that's interesting, I did not know this. Maybe this is why authorities are all up in a tizzy over it. Because it can't be their platform security, which is largely theatre.

Re: Is Telegram really an encrypted messaging app?

#595
post #154

Earlier quoted context omitted.

Signal has probably the worst UX of any messaging app. It also used to require sharing phone numbers to add contacts, which imo is already a privacy violation. Telegram is fast, responsive, gets frequent updates, has great group chat, tons of animated emojis, works flawlessly on all desktop and mobile platforms, has great support for media, bots, and a great API, allows edits and deleting messages for all users, and…

Telegram consumes up to 50% of battery charge on iOS, with practically zero daily usage, all energy saving settings enabled, and a single followed channel, whether or not I force close the app or reinstall it. I gave up on trying to make it work, merely installing the fucking app ensures my phone is dead in the morning.

You can use Telegram Web.

Re: Is Telegram really an encrypted messaging app?

#596
post #99
post #48

Earlier quoted context omitted.

You can coherently argue that encryption doesn't matter, but you can't reasonably argue that Telegram is a serious encrypted messaging app (it's not an encrypted messaging app at all for group chats), which is the point of the article. The general attitude among practitioners in the field is: if you have to reason about how the operator will handle legal threats, you shouldn't bother reasoning about the messenger at…

> if you have to reason about how the operator will handle legal threats, you shouldn't bother reasoning about the messenger at all. That's true. You need to run your own platform people. XMPP is plenty simple, plenty powerful, and plenty safe -- and even your metadata is in your control. Just self host. There's no excuse in 2024. Wake up people! Why should the arrest of someone else affect YOU?

Or better use a P2P IM like Jami: https://jami.net

Re: Is Telegram really an encrypted messaging app?

#597
post #552

Earlier quoted context omitted.

> Moderation is what happens here on HN: Admins have some policies to keep the conversation on track, users voluntarily submit to them. What do you mean by users voluntarily submitting to these policies? This distinction seems key in your argument, but I don't see what alternatives to submitting I have here, making it involuntary, right?

No, you miss the point. If HN decided to ban all posts about Donald Trump that is moderation. Users voluntarily submit to this policy by participating in the site, and if they do not, they will be banned. If the State of California required that all web sites run from their state are REQUIRED to ban all posts about Donald Trump, that is censorship. Moderation is "your house, your rules" while censorship is someone el…

Thanks, I see and agree.

Re: Is Telegram really an encrypted messaging app?

#598

Same thing with proton mail. I have never understood the "Trust me bro we encrypt it" business model. If it's not your key on your client machine it's not encrypted.

Note that Proton Mail servers don't hold your private master key directly — it is always stored encrypted with your password. Also, Proton Mail allows you to import your keys: https://proton.me/support/pgp-key-management

They say

Re: Is Telegram really an encrypted messaging app?

#600
post #377

Earlier quoted context omitted.

Sadly, you still have to pipe all messages through Apple’s notification API if you want notifications on iOS

Metadata? Yes. The plaintext of the messages is not piped through the notification API. https://www.medianama.com/2023/12/223-signal-push-notificati...

Wasn’t this the exact rhetoric used to justify PRISM during the Snowden revelations?
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