Microsoft Technology Licensing, LLC

Biying Tan

Ye Xu

Prithviraj Sanjeev Kanherkar

Etan Micah Basseri

Caroline Katherine Templeton

A trained machine learning model distinguishes between human-driven accounts and machine-driven accounts by performing anomaly detection based on sign-in data and optionally also based on directory data. This machine versus human distinction supports security improvements that apply security controls and other risk management tools and techniques which are specifically tailored to the kind of account being secured. Formulation heuristics can improve account classification accuracy by supplementing a machine learning model anomaly detection result, e.g., based on directory information, kind of IP address, kind of authentication, or various sign-in source characteristics. Machine-driven accounts masquerading as human-driven may be identified as machine-driven. Reviewed classifications may serve as feedback to improve the model's accuracy. A precursor machine learning model may generate training data for training a production account classification machine learning model.

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Biying Tan