https://www.theverge.com/2018/7/27/17621312/telegram-passport-log-in-license-id-apps-services-ico-finance

Telegram is introducing a new feature called Passport, a single-single on option for services that need actual real-world IDs or documents. Passport will let users store their files and data in Telegram’s cloud and pass it directly on to services that need that information (via Neowin.)

The company envisions users using Telegram Passport logins for signing up for things like financial services or ICOs, which tend to need real-world ID cards, passports, or other documentation. With Passport, you’ll be able to upload your documents and personal information, which users will be able to pass along to supported services with a single tap.