Google Inc.

Philipp Helmut Pfeiffenberger

Adrian J Isles

David Bruce Turner

David Turner

A method includes receiving, by a service provider platform, a service request from a first client device, and a first instance of an authentication token associated with the service request and generated by the first client device. The service provider platform may further receive, from a second client device, a second instance of the authentication token associated with the service request and generated by the first client device. Responsive to determining that the first instance of the authentication token matches the second instance of the authentication token, the service request is processed by the service provider platform.

Using co-located secondary devices to protect against cookie theft

This disclosure relates to a method for privacy-preserving web activity monitoring including receiving, from an application on a user device of a user, a request for digital content from a domain, assigning, to the application and at a first time, a randomized cohort constructed based on a randomly selected identifier and a timestamp indicating the first time at which the randomized cohort was assigned to the application, and providing, to the application and at the first time, (i) a digitally signed certificate corresponding to the randomly selected identifier and the timestamp and (ii) a unique public key and corresponding unique private key associated with the certificate, wherein the randomly selected identifier is also assigned to at least a threshold number of other applications executing on other user devices within a predetermined period of time of the assignment of the randomized cohort to the application.

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San Francisco, CA, United States of America

Philipp Helmut Pfeiffenberger