Telegram Passport shares your data with services requiring real-world ID
Telegram Passport is billed as a “unified authorization method for services that require personal identification”, which definitely sounds convenient, but not particularly secure. Basically, Telegram is asking its users to hand over their personal information for “instant sharing” with “services that require real-world ID.”
Said data is stored in Telegram’s own cloud, and even though you’re promised end-to-end encryption turning everything into “random”, uncrackable “gibberish”, not everyone’s going to be comfortable sharing sensitive info like that.
For what it’s worth, all Telegram Passport data will be transferred to a decentralized cloud at some point “in the future”, and third-party verification is to be added “soon” as well. The feature is technically enabled in the latest Telegram version (4.9), available for both Android and iOS devices, although for the time being, only one electronic payments system (ePayments.com) supports registration and verification with Telegram Passport.