The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2024
Filed:
May. 05, 2021
Paypal, Inc., San Jose, CA (US);
Zhe Chen, Singapore, SG;
Hewen Wang, Singapore, SG;
Yuzhen Zhuo, Singapore, SG;
Solomon kok how Teo, Singapore, SG;
Shanshan Peng, Singapore, SG;
Quan Jin Ferdinand Tang, Singapore, SG;
Serafin Trujillo, Singapore, SG;
Kenneth Bradley Snyder, San Jose, CA (US);
Mandar Ganaba Gaonkar, San Jose, CA (US);
Omkumar Mahalingam, Santa Clara, CA (US);
PayPal, Inc., San Jose, CA (US);
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.