"Assuming it goes well, this should become available to every Android developer around the world by the end of the year," Dan Kaufman, head of ATAP at Google, said at I / O.
The trust score is based off various user-specific data points, including current location, facial recognition, and typing patterns. Certain apps could require different scores. A banking app might want a higher trust score than Instagram requires, for instance. The Trust API always runs in the background of users' devices, monitoring its sensors and information to so that it can provide apps with the current trust score — basically its confidence level that you are who you say you are.
SOURCES - The Verge, Google, Youtube