Related to IMSI-catching (actually its TMSI which the suspect gets from the MITM device) we here try to find out if it is possible to live decrypt with any tool the Telegram Messenger stream. MTproto is the proprietary encryption which is seen as medium secure.
Who knows a tool for live decryption we could attach to our IMSI-catcher?
we could decrypt easily Telegram chats, secure chats messenger
Also any other "peudo-secure" encrypted call from other manufacturers.
But you need to use the IMSI catcher with an active attack on target device, execpt you are a goverment agency, you could get legal problems if you use it on that.
Belkafoft supports Telegram Messenger.
The IMSI catcher is SDR-based and active mode able (transceiver). Live stream is the crux. Can Belka live? How to integrate to reduce latency? OpenBTS