Facebook, Inc.

Trevor M Pottinger

Balamanohar Paluri

Nikhil Johri

Systems, methods, and non-transitory computer-readable media can detect an operation that causes a challenge response process to be initiated. An image category associated with a recognized category label can be identified. At least one image associated with the image category can be displayed during the challenge response process. The operation can be executed when the challenge response process, based on the at least one image, is successfully completed.

Systems and methods for providing image-based security measures

Systems, methods, and non-transitory computer-readable media can obtain at least one content item for which a hash value is to be generated. A set of n-grams can be generated based at least in part on the at least one content item. A first vector can be generated based at least in part on the set of n-grams, wherein the vector maintains respective counts of n-grams in the set of n-grams. A quantized vector can be determined based at least in part on the first vector and one or more parameters. The hash value for the at least one content item can be generated based at least in part on the quantized vector.

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Mountain View, CA, United States of America

Trevor M Pottinger