Methods and apparatus for protecting domains of a device from unauthorized accesses

US10757100B2 · kind B2 · utility

Assignee

• ARM IP LIMITED · GB

Inventors

• Alessandro Angelino · London, GB
• Milosch Meriac · Berlin, DE

Key dates

• Filing date: Jul 26, 2017
• Grant date: Aug 25, 2020
• Expiry date: Dec 27, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L63/101
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A machine implemented method for protecting a target domain and a source domain from unauthorized accesses. The method comprising: identifying an exit call gateway comprising an exit transition instruction and at least one exit access parameter, said exit access parameters restricting exit from said source domain; identifying an entry call gateway corresponding to said exit call gateway, said entry call gateway comprising a transition instruction and at least one entry access parameter, said entry access parameters restricting access to said target domain; determining that said exit access parameters and said entry access parameters are compatible with each other; and performing a context switch from said source domain to said target domain, when said exit access parameters and said entry access parameters are complied with.