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Is Telegram really an encrypted messaging app? – A Few Thoughts on Cryptographic Engineering

https://blog.cryptographyengineering.com/2024/08/25/telegram-is-not-really-an-encrypted-messaging-app/

This post is inspired by the recent and concerning news that Telegram’s CEO Pavel Durov has been arrested by French authorities for its failure to sufficiently moderate content. While I don’t know the details, the use of criminal charges to coerce social media companies is a pretty worrying escalation, and I hope there’s more to the story.

But this arrest is not what I want to talk about today.

What I do want to talk about is one specific detail of the reporting. Specifically: the fact that nearly every news report about the arrest refers to Telegram as an “encrypted messaging app.” Here are just a few examples:

This phrasing drives me nuts because in a very limited technical sense it’s not wrong. Yet in every sense that matters, it fundamentally misrepresents what Telegram is and how it works in practice. And this misrepresentation is bad for both journalists and particularly for Telegram’s users, many of whom could be badly hurt as a result.