Abstract: An analytics server for use in a transaction system with a terminal for performing authenticated user-initiated transactions and generating transaction data including a user identity associated with each transaction and a camera for capturing image data of a user performing an authenticated transaction at the terminal is configured to extract user characteristic features from the image data associated with authenticated transactions and iteratively update a user database of the user characteristic features over multiple authenticated transactions. The analytics server is further configured to compute a match score, based on preset rules, of the user characteristic features for a current transaction with the user characteristic features associated with a current user stored in the user database, and raise an alarm when the match score fails to meet a threshold value.

Abstract: An analytics server for use in a transaction system with a terminal for performing authenticated user-initiated transactions and generating transaction data including a user identity associated with each transaction and a camera for capturing image data of a user performing an authenticated transaction at the terminal is configured to extract user characteristic features from the image data associated with authenticated transactions and iteratively update a user database of the user characteristic features over multiple authenticated transactions. The analytics server is further configured to compute a match score, based on preset rules, of the user characteristic features for a current transaction with the user characteristic features associated with a current user stored in the user database, and raise an alarm when the match score fails to meet a threshold value.