Hardware functionality scan: Difference between revisions

Revision as of 22:18, 16 March 2019

Latest revision as of 02:21, 9 January 2020

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{{refimprove|date=February 2012}}

A '''hardware functionality scan''' ('''HFS''') is conducted in order to verify that a certain device is really what it claims to be. It is patented by [[Microsoft]].<ref>{{cite web |url= http://www.freshpatents.com/Hardware-functionality-scan-for-device-authentication-dt20061026ptan20060242430.php?type=description |title=Patent: Hardware Functionality Scan For Device Authentication |first= |last= |work=freshpatents.com |year=2012 |accessdate=August 21, 2012 |archive-url=https://web.archive.org/web/20120204165348/http://www.freshpatents.com/Hardware-functionality-scan-for-device-authentication-dt20061026ptan20060242430.php?type=description |archive-date=February 4, 2012 |url-status=dead }}</ref>

Some [[operating system]]s only send copy protected content, such as [[Film|movies]], to an output device, such as the screen, if that device is able to protect the content from being tapped in an unprotected format. This mechanism can be circumvented by letting fake hardware claiming to be a trusted device. HFS prevents this by letting the device perform certain tasks which are hard to emulate.