Online services monitor several browser properties (features) to estimate the risk score.

We found evidence that these features and internal weightings were used:

ServiceUsed features and weightings
Amazon
  • IP address
GOG.com
  • IP address
Google
  1. IP address
  2. Time parameters
  3. User agent string, display resolution
LinkedIn
  1. IP address
  2. User agent string, language, time parameters, display resolution