US 2006/0218409 A1 · Accessing a USB host controller security extension using a HCD proxy

Abstract

Systems and methods for enabling trusted software to monitor and control USB traffic associated with a security extension of a host controller and devices in a USB topology is disclosed. A host controller proxy receives USB-related data from a host controller driver, determines whether the data is of a security interest, and if so, sends the data to a driver for a security extension executing in the trusted execution environment. Likewise, after software executing in the trusted execution environment evaluates and appropriately addresses data sent by the HCD proxy or data retrieved from a hardware security extension, the HCD proxy receives data from the trusted execution environment for further dissemination.

Claims20

Dependent claims

A method, comprising:

obtaining first data associated with a USB device, wherein the first data is a result of program code associated with the USB device being executed outside of a trusted execution environment of a computer;
sending second data associated with the first data to the trusted execution environment;
and
receiving third data associated with the first data from the trusted execution environment.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

11/090,547Filed 25 Mar 2005

Published

28 Sep 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 13/102
Program control for peripheral devices: where the program performs an interfacing function, e.g. device driver
G06F 21/53
During program execution, e.g. stack integrity ; Preventing unwanted data erasure; Buffer overflow: by executing in a restricted environment, e.g.…
G06F 21/85
Protecting input, output or interconnection devices: interconnection devices, e.g. bus-connected or in-line devices
G06F 2213/0042
Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central…:…

Accessing a USB host controller security extension using a HCD proxy

Life of this patent

Accessing a USB host controller security extension using a HCD proxy

Life of this patent

Abstract

Claims20