公开(公告)号：US11907658B2

公开(公告)日：2024-02-20

申请号：US17308931

申请日：2021-05-05

Applicant: PayPal, Inc.

Inventor： Zhe Chen ,  Hewen Wang ,  Yuzhen Zhuo ,  Solomon kok how Teo ,  Shanshan Peng ,  Quan Jin Ferdinand Tang ,  Serafin Trujillo ,  Kenneth Bradley Snyder ,  Mandar Ganaba Gaonkar ,  Omkumar Mahalingam

IPC: G06F40/279 ,  G06F21/55 ,  G06F21/56 ,  G06F40/284 ,  G06F40/30 ,  G06F18/2321 ,  G06F18/2415

CPC classification number: G06F40/284 ,  G06F18/2321 ,  G06F18/2415 ,  G06F40/30

Abstract: Systems and methods for user-agent anomaly detection are disclosed. In one embodiment, a user-agent string may be embedded into a numerical data vector representation using a sentence embedding algorithm (e.g., FastText). A predictive score may be calculated based on the numerical data vector representation and using a probability distribution function model that models a likelihood of occurrence of the observed user-agent based on patterns learned from historic payload data (e.g., a Gaussian Mixture Model). The predictive score may be compared to a threshold and, based on the comparison, it may be determined whether the user-agent is fraudulent.

公开(公告)号：US12216745B2

公开(公告)日：2025-02-04

申请号：US18146738

申请日：2022-12-27

Applicant: PAYPAL, INC.

Inventor： Zhe Chen ,  Jiyi Zhang ,  Hewen Wang ,  Panpan Qi ,  Quan Jin Ferdinand Tang ,  Solomon kok how Teo ,  Yuzhen Zhuo ,  Mandar Ganaba Gaonkar ,  Fei Pei ,  Omkumar Mahalingam

IPC: G06F21/31 ,  G06F21/32

Abstract: Methods and systems are presented for bot detection. A movement of a pointing device is tracked via a graphical user interface (GUI) of an application executable at a user device. Movement data associated with different locations of the pointing device within the GUI is obtained. The movement data is mapped to functional areas corresponding to a range of the different locations of the pointing device within the GUI over consecutive time intervals. At least one vector representing a sequence of movements for at least one trajectory of the pointing device through one or more of the functional areas and a duration the pointing device stays within each functional area is generated. At least one trained machine learning model is used to determine whether the sequence of movements of the pointing device was produced through human interaction with the pointing device by an actual user of the user device.

公开(公告)号：US20220358289A1

公开(公告)日：2022-11-10

申请号：US17308931

申请日：2021-05-05

Applicant: PayPal, Inc.

Inventor： Zhe Chen ,  Hewen Wang ,  Yuzhen Zhuo ,  Solomon kok how Teo ,  Shanshan Peng ,  Quan Jin Ferdinand Tang ,  Serafin Trujillo ,  Kenneth Bradley Snyder ,  Mandar Ganaba Gaonkar ,  Omkumar Mahalingam

IPC: G06F40/284 ,  G06F40/30 ,  G06K9/62

Abstract: Systems and methods for user-agent anomaly detection are disclosed. In one embodiment, a user-agent string may be embedded into a numerical data vector representation using a sentence embedding algorithm (e.g., FastText). A predictive score may be calculated based on the numerical data vector representation and using a probability distribution function model that models a likelihood of occurrence of the observed user-agent based on patterns learned from historic payload data (e.g., a Gaussian Mixture Model). The predictive score may be compared to a threshold and, based on the comparison, it may be determined whether the user-agent is fraudulent.

公开(公告)号：US20240211559A1

公开(公告)日：2024-06-27

申请号：US18146738

申请日：2022-12-27

Applicant: PAYPAL, INC.

Inventor： Zhe Chen ,  Jiyi Zhang ,  Hewen Wang ,  Panpan Qi ,  Quan Jin Ferdinand Tang ,  Solomon kok how Teo ,  Yuzhen Zhuo ,  Mandar Ganaba Gaonkar ,  Fei Pei ,  Omkumar Mahalingam

IPC: G06F21/31 ,  G06F21/32

CPC classification number: G06F21/316 ,  G06F21/32

Abstract: Methods and systems are presented for bot detection. A movement of a pointing device is tracked via a graphical user interface (GUI) of an application executable at a user device. Movement data associated with different locations of the pointing device within the GUI is obtained. The movement data is mapped to functional areas corresponding to a range of the different locations of the pointing device within the GUI over consecutive time intervals. At least one vector representing a sequence of movements for at least one trajectory of the pointing device through one or more of the functional areas and a duration the pointing device stays within each functional area is generated. At least one trained machine learning model is used to determine whether the sequence of movements of the pointing device was produced through human interaction with the pointing device by an actual user of the user device.

公开(公告)号：US11886590B2

公开(公告)日：2024-01-30

申请号：US17473490

申请日：2021-09-13

Applicant: PayPal, Inc.

Inventor： Zhe Chen ,  Hewen Wang ,  Quan Jin Ferdinand Tang ,  Solomon kok how Teo ,  Yuzhen Zhuo ,  Serafin Trujillo ,  Mandar Ganaba Gaonkar ,  Omkumar Mahalingam ,  Kenneth Bradley Snyder

IPC: G06F40/205 ,  G06F18/2413 ,  G06F21/56 ,  G06F18/214

CPC classification number: G06F21/566 ,  G06F18/2148 ,  G06F18/2413 ,  G06F40/205 ,  G06F2221/034

Abstract: 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.

公开(公告)号：US20230084532A1

公开(公告)日：2023-03-16

申请号：US17473490

申请日：2021-09-13

Applicant: PayPal, Inc.

Inventor： Zhe Chen ,  Hewen Wang ,  Quan Jin Ferdinand Tang ,  Solomon kok how Teo ,  Yuzhen Zhuo ,  Serafin Trujillo ,  Mandar Ganaba Gaonkar ,  Omkumar Mahalingam ,  Kenneth Bradley Snyder

IPC: G06F21/56 ,  G06K9/62 ,  G06F40/205

Abstract: 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.