Although in practice DMCA is abused to assert all and any control of information in the public's hands, it is supposed to only shore up the TPMs in their protection of copyright infringement.

If you are wealthy and can afford the lawyers, the DMCA does not prevent non-infringing use of a copyrighted work.

The DMCA does prohibit circumvention of TPMs for which the primary purpose is infringement.

In the case of keys used by HD-DVDs, these do not circumvent the TPMs but are involved in decrypting the contents of the DVD for playback - a wholly non-infringing purpose - and a process that has to be performed in order to view the DVD.

These keys are provided on the DVD player and the disks, both devices being in the possession of the viewer, including the information thereon. They may not be easy to discern, but they are nevertheless available upon detailed inspection.

The keys are not subject to copyright - not being original works. Nor has the purchaser signed any non-disclosure agreement concerning them.

What is effectively happening then, is simply that legitimate purchasers of DVD players and media are exchanging notes concerning the keys they have discerned. This presumably then enables them to view the DVDs on Linux PCs.

No-one is betraying anyone's secrets. No TPMs are being circumvented. No copyright infringement is occurring.

Crosbie, sadly much of what you say above is an opinion not shared by judges ruling on these cases.
In fact, you've made exactly the argument which *lost* in the DeCSS case.

Yes, I should have added a caveat that whatever the law says is only a guide when it comes to the day in court, what matters is its interpretation.

And as you know, having also had a glimpse of the total perspective vortex, our interpretations of the law register on the legal seismometer with as much force as the footsteps of a flea.

But then the law is supposed to encode the will of the people...

How many Lilliputian proletarians does it take to counter the interpretational persuasions of a plutocrat the size of Bill Gates?

We have an entire planet of people.
Persuasion is possible.
Peer to peer.
:)

I don't read the Guardian much, so I have to ask: Is their technology section conceived to be targeted to a highly tech-savvy audience?

I ask because I've noticed in your columns that the presentation is typically more inside-baseball than the standard newspaper story. For instance, in the column at hand, there are straight-up references to things like "Digg" and "RSA" -- without the boilerplate explainers that would normally accompany such. ("Digg, a popular community website where users rank stories... .")

Tom, yes, this appears in their Technology supplement, so it is rather more targeted to that tech audience. The editor didn't balk at the RSA and Digg references, so I assume they were at least OK in context. I have had drafts for other columns rejected/need-rewrite for too much jargon. I try to be aware of the issue, but sometimes there's so much I want to say about a topic that I forget those explainers.