●● IRC: #techbytes @ Techrights IRC Network: Thursday, August 27, 2026 ●●
● Aug 27
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● Aug 27
[07:57]	schestowitz[TR2]	This is not precisely correct, so here's the precise explanation.
[07:57]	schestowitz[TR2]	In the Tivo, the proprietary software in question was preinstalled
[07:57]	schestowitz[TR2]	firmware, not modifiable at all.  The Tivo also contained a modified
[07:57]	schestowitz[TR2]	version of Linux, modified with a malicious DRM functionality.  The
[07:57]	schestowitz[TR2]	firmware would verify that the running copy of Linux was the precise
[07:57]	schestowitz[TR2]	binary that the company had shipped.  As a result, it was impossible
[07:57]	schestowitz[TR2]	to fix the DRM by installing a modified version of Linux -- the
[07:57]	schestowitz[TR2]	firmware would detect that and turn off some functionality.
[07:57]	schestowitz[TR2]	(DRM decoding, I think.)
[07:57]	schestowitz[TR2]	The fix in GPLv3 was to require the binary to be accompanied by
[07:57]	schestowitz[TR2]	installation information -- how to install a modified version of the
[07:57]	schestowitz[TR2]	GPLv3-covered program in the same hardware and have it fully
[07:57]	schestowitz[TR2]	functional.
[07:57]	schestowitz[TR2]	:"This is not precisely correct, so here's the precise explanation.
[07:57]	schestowitz[TR2]	In the Tivo, the proprietary software in question was preinstalled
[07:57]	schestowitz[TR2]	firmware, not modifiable at all.  The Tivo also contained a modified
[07:57]	schestowitz[TR2]	version of Linux, modified with a malicious DRM functionality.  The
[07:57]	schestowitz[TR2]	firmware would verify that the running copy of Linux was the precise
[07:57]	schestowitz[TR2]	binary that the company had shipped.  As a result, it was impossible
[07:57]	schestowitz[TR2]	to fix the DRM by installing a modified version of Linux -- the
[07:57]	schestowitz[TR2]	firmware would detect that and turn off some functionality.
[07:57]	schestowitz[TR2]	(DRM decoding, I think.)
[07:57]	schestowitz[TR2]	The fix in GPLv3 was to require the binary to be accompanied by
[07:57]	schestowitz[TR2]	installation information -- how to install a modified version of the
[07:57]	schestowitz[TR2]	GPLv3-covered program in the same hardware and have it fully
[07:57]	schestowitz[TR2]	functional."
● Aug 27
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