You actually brought up something I've wondered about: When Sony, or the DVD consortium, or whoever it is *this* time start crying about the release of their respective signing key and claiming copyright to the number, why not just start representing it in decimal, or as the multiple of two primes, or some other form that is clearly not subject to copyright/patent?
For exqample, the so called "09 F9" AACS key is 13,256,278,887,989,457,651,018,865,901,401,704,640, so that decimal number in and of itself is now copyrighted? Or patented?
Maybe we should make a website that generates sequential numbers from 1->arbitrarily large, discounting those that are known to be things like the CSS key. If any other number is used as a cryptographic key in a commercial product, they would clearly be violating our copyright on that particular arbitrarily large number, right?