[happyhappy]

Telegram should be considered insecure. See this post for a nice summary: http://security.stackexchange.com/a/49802

[nicpottier]

That seems more like an ad-hominem than anything.

Their secret chats specifically seem like they would be entirely secure.

[edraferi]

Steve Gibson did a pretty detailed analysis of Telegram on Security Now #444, recorded 25 Feb 2014. He concluded that Telegram's security was inadequate and recommended Threema as an alternative.

http://twit.tv/show/security-now/444

https://threema.ch/en

[nicpottier]

Thanks for the link to the security-now show, good stuff and does a good job of explaining the reservations in the crypto community around Telegram. I'm now looking at other options.

I do like that Telegram launched with an API, but ya, it sounds like security isn't something that can be trusted. Thanks for the informative link.

[icebraining]

Putting someone's credentials into question is not necessarily an ad hominem.

But in any case, you seem to have missed this bit: "The protocol they invented is flawed. Here is a nice blog post explaining why."

[tptacek]

It would be interesting if you could find a reputable cryptographer to agree with either of those sentences.