That seems more like an ad-hominem than anything.

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

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

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.

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."

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