A new analysis of TM Signal’s source code appears to show that the app sends users’ message logs in plaintext. At least one top Trump administration official used the app.

The clone, TeleMessage, was the subject of a reported hack in which the contents of some direct messages and group chats were stolen.

Data pertaining to the U.S. Customs and Border Protection, Coinbase, and financial service providers like Scotiabank has reportedly been compromised.