Paypal, Inc.

Serafin Trujillo

Mandar Ganaba Gaonkar

Kenneth Bradley Snyder

Yuzhen Zhuo

Quan Jin Ferdinand Tang

Hewen Wang

Zhe Chen

Solomon Kok How Teo

Omkumar Mahalingam

Changching Chi

Anand Sengamalai

Systems and methods for emulator detection are disclosed. In one embodiment, a user agent string may be embedded into a first numerical data vector representation. Hardware characteristics of a client device corresponding to the user agent may be embedded into a second numerical data vector representation. Based on the first numerical data vector representation of the user agent and the second numerical data vector representation of the hardware characteristics, and their consistency, the client device may be determined to be an emulator or a non-emulator device.

Emulator detection using user agent and device model learning

Techniques are disclosed relating to transaction authorization. In some embodiments, a server computer system receives and caches browsing information for a device of a user, where the browsing information relates to a transaction service. The server computer system may then receive a request to authorize one or more transactions via the transaction service. The server computer system may evaluate the cached browsing information to determine whether the user is attempting to perform multiple concurrent transactions via the transaction service. Based on the evaluating, the server computer system may determine whether to authorize the one or more transactions. In some embodiments, the disclosed techniques may advantageously prevent or reduce authorization of duplicate transactions that are concurrently attempted by a user.

Duplicate concurrent transaction detection

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San Jose, CA, United States of America

Serafin Trujillo