Pavel Durov

So we felt instantly when we were trying to switch to, say, secret chats to

share large documents and try to get work done.

It was just not adapted for it.

At the same time, if you were really paranoid, you think, you know, I don't want to be screenshotted.

I don't want to have any leaks.

I don't even trust Telegram.

I only trust code.

And secret chats are the best option.

I believe it is the most secure means of communication today.

So you need reproducible builds in order to verify that the app really does what it claims, really encrypts data in a way that it is described on its website.

For that, you need to make your apps open source for any researchers to have a look at it.

Telegram has been open source since 2013.

Apps like WhatsApp have never been open source, so you don't really know what they're doing and how exactly they encrypt your messages.

What's important here though is to understand whether the version of the app that you download from the App Store corresponds exactly to the source code that you can view on GitHub.

And for that you need reproducible builds.

As you said, Telegram is the only popular messaging app that does that.

We allow people to make sure, both on Android and the IRS, that the source code of Telegram on GitHub and the app you're actually using is the same app.

I think it's incredibly important, not just to gain people's trust, but just to stay transparent and open about it.

When I make this claim that Telegram's secret chats are the most secure way

way of communicating, I really mean it, because I haven't seen any fact contradicting this claim.