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:
Mar. 24, 2020
Filed:
Sep. 18, 2017
Apple Inc., Cupertino, CA (US);
Lucas O. Winstrom, Palo Alto, CA (US);
Eric D. Friedman, Berkeley, CA (US);
Ritwik K. Kumar, San Jose, CA (US);
Jeremy M. Stober, Austin, TX (US);
Amol V. Pattekar, San Jose, CA (US);
Benoit Chevallier-Mames, Paris, FR;
Julien Lerouge, San Jose, CA (US);
Gianpaolo Fasoli, Redwood City, CA (US);
Augustin J. Farrugia, Los Altos Hills, CA (US);
Mathieu Ciet, Paris, FR;
Apple Inc., Cupertino, CA (US);
Abstract
Systems and methods are described for rate-limiting a message-sending client interacting with a message service based on dynamically calculated risk assessments of the probability that the client is, or is not, a sender of a spam messages. The message service sends a proof of work problem to a sending client device with a difficulty level that is related to a risk assessment that the client is a sender of spam messages. The message system limits the rate at which a known or suspected spammer can send messages by giving the known or suspected spammer client harder proof of work problems to solve, while minimizing the burden on normal users of the message system by given them easier proof of work problems to solve that can typically be solved by the client within the time that it takes to type a message.