Key throttling to mitigate unauthorized file access

US10469522B2 · kind B2 · utility

Assignee

• Sophos Limited · GB

Inventors

• Russell Humphries · Redmond, US
• Kenneth D. Ray · Seattle, US
• Anthony John Merry · Kessel-Lo, BE
• Harald Schütz · Linz, AT

Key dates

• Filing date: Jun 10, 2016
• Grant date: Nov 5, 2019
• Expiry date: Mar 28, 2037

Classification

• Technology area (CPC —): General

Abstract

A file system extension for an endpoint controls access to files by selectively decrypting files under certain conditions. Where a pattern of access to the files suggests malicious and/or automated file access activity, the file system extension may limit the rate of file access by regulating the rate at which decryption is provided to requesting processes.