Both Russians and Ukrainians use Telegram, including confidential messaging with their agents on the foreign territory. So that's a prove enough for me, that it's safe enough.
https://www.nytimes.com/2023/01/04/world/europe/ukraine-russ...
> Ukrainian artillery targets Russian soldiers by pinpointing their phone signals. Despite the deadly results, Russian troops keep defying a ban on cellphone use near the front.
It's especially critical to drip-feed feel good news when you losing.
> “It is already clear that the main reason of what took place included the massive use, contrary to the ban, of personal mobile phones in the range of enemy weapons,” the Russian Defense Ministry said in a statement. The cellphone data allowed Ukraine, it said, to “determine the coordinates of the location of military service members to inflict a rocket strike.”
If you claim that neither Russian, nor Ukrainian special services are competent, I'd disagree with you.
Possible, as many ridiculous things happened around the whole war. (Recently german generals on a video chat were targeted by the russians, wasn't too hard, they did not use any encyption at all)
Sources would be nice though.
But it really would not be a reason for me to trust telegrams security.
Rather a confirmation again, that also secret services can show great incompetence.
They used Webex. Doesn't Webex use any encryption at all?
IDK, the whole anti-Signal post really makes me suspicious of Telegram whereas I wasn't really before. Are trying to be the universal honeypot for agencies?