ONLINE USER BEHAVIOR ANALYSIS SERVICE BACKED BY DEEP LEARNING MODELS TRAINED ON SHARED DIGITAL INFORMATION

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for online fraud protection. One of the methods includes receiving a query associated with a user account of an online service provider; providing the query to a deep neural network model to generate a prediction of whether the user account is fraudulent, wherein the deep neural network model is trained using anonymized event data for a collection of users received from one or more online service providers; and providing the prediction to the online service provider.