There's another, ironic, twist to this story - Sony have infringed other software authors copyright in the development of their copy protection software! - and the code* they stole was written by "DVD Jon" Johansen, famous in turn for writing copy-protection-busting software himself.

More twists that a plateful of spaghetti...

Anahata

* BTW, the code in question was LGPL licensed, a free software license - this story illustrates that the GPL and LGPL are still copyright statements and do impose some obligations on anyone who copies it.