Google Inc.

Edison Tan

Wei Liu

Vinay Damodar Shet

Ying Ying Liu

Aaron Malenfant

Sacha Christophe Arnoud

Jiexing Gu

Haidong Shao

Hongshu Liao

David John Abraham

Yannis Agiomyrgiannakis

Michael Crawford

Joseph Andrew Mcclain

Colin Mcmillen

Luis Von Ahn

Bryan Arthur Pendleton

Angelique Moscicki

Mark R Russell

Systems and methods of determining image characteristics are provided. More particularly, a first image having an unknown characteristic can be obtained. The first image can be provided to a plurality of user devices in a verification challenge. The verification challenge can include one or more instructions to be presented to a user of each user device. The instructions being determined based at least in part on the first image. User responses can be received, and an unknown characteristic of the first image can be determined based at least in part on the received responses. Subsequent to determining the unknown characteristic of the first image, one or more machine learning models can be trained based at least in part on the determined characteristic.

Image based CAPTCHA challenges

Systems and methods for generating and performing a three-dimensional audio CAPTCHA are provided. One exemplary system can include a decoy signal database storing a plurality of decoy signals. The system also can include a three-dimensional audio simulation engine for simulating the sounding of a target signal and at least one decoy signal in an acoustic environment and outputting a stereophonic audio signal based on the simulation. One exemplary method includes providing an audio prompt to a resource requesting entity. The audio prompt can have been generated based on a three-dimensional audio simulation of the sounding of a target signal containing an authentication key and at least one decoy signal in an acoustic environment. The method can include receiving a response to the audio prompt from the resource requesting entity and comparing the response to the authentication key.

Systems and methods for three-dimensional audio CAPTCHA

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Brooklyn, NY, United States of America

Edison Tan