[Discussioni] Fwd: Patent for Digital Rights Management OS

[Alessandro Rubini]

> From: Seth Johnson <seth.johnson a RealMeasures.dyndns.org>
> To: [tante liste]
> Subject: [Patents] MS Patent for Digital Rights Management OS
> Date: Thu, 13 Dec 2001 01:17:07 -0500
> 
> [...]
> 
> -------- Original Message --------
> Date: Wed, 12 Dec 2001 23:18:08 -0800
> From: John Young <jya a PIPELINE.COM>
> 
> Microsoft's patent for a Digital Rights Management Operating System was
> awarded yesterday:
> 
>   http://cryptome.org/ms-drm-os.htm
> 
> Abstract
> 
> A digital rights management operating system protects rights-managed
> data, such as downloaded content, from access by untrusted programs
> while the data is loaded into memory or on a page file as a result of
> the execution of a trusted application that accesses the memory. To
> protect the rights-managed data resident in memory, the digital rights
> management operating system refuses to load an untrusted program into
> memory while the trusted application is executing or removes the data
> from memory before loading the untrusted program. If the untrusted
> program executes at the operating system level, such as a debugger, the
> digital rights management operating system renounces a trusted identity
> created for it by the computer processor when the computer was booted.
> To protect the rights-managed data on the page file, the digital rights
> management operating system prohibits raw access to the page file, or
> erases the data from the page file before allowing such access.
> Alternatively, the digital rights management operating system can
> encrypt the rights-managed data prior to writing it to the page file.
> The digital rights management operating system also limits the functions
> the user can perform on the rights-managed data and the trusted
> application, and can provide a trusted clock used in place of the
> standard computer clock.