公开(公告)号：WO2018156359A1

公开(公告)日：2018-08-30

申请号：PCT/US2018/017420

申请日：2018-02-08

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： WATSON, Alexander ,  BRIM, Daniel ,  SIMMONS, Christopher ,  RADULOVIC, Paul ,  BRAY, Tyler Stuart ,  BRINKLEY, Jennifer Anne ,  JOHNSON, Eric ,  CHIN, Victor ,  RASGAITIS, Jack ,  CAI, Nai Qin ,  GOUGH, Michael ,  ANGER, Max

IPC: G06N3/02 ,  G06N5/00 ,  G06F21/55 ,  G06F21/62 ,  G06N3/04 ,  G06F17/30 ,  G06N5/04 ,  G06N7/00 ,  G06Q20/40

Abstract: A corpus of documents (and other data objects) stored for an entity can be analyzed to determine one or more topics for each document. Elements of the documents can be analyzed to also assign a risk score. The types of topics and security elements, and the associated risk scores, can be learned and adapted over time using, for example, a topic model and random forest regressor. Activity with respect to the documents is monitored, and expected behavior for a user determined using a trained recurrent neural network. Ongoing user activity is processed to determine whether the activity excessively deviates from the expected user activity. The activity can also be compared against the activity of user peers to determine whether the activity is also anomalous among the user peer group. For anomalous activity, risk scores of the accessed documents can be analyzed to determine whether to generate an alert.