Fun read. I wrote a DRM system in the early 90's for try-before-you-buy. Instead of a gateway, we would perchlorate portions of code APIs through a lattice. Som

Fun read. I wrote a DRM system in the early 90's for try-before-you-buy. Instead of a gateway, we would perchlorate portions of code APIs through a lattice. Somewhat like a one-way hash. I think there 512 keys -- one for each node. You couldn't disassemble static code, you had to set breakpoints. But, there was a bug. Instead of extracting 512 keys, you only had to extract 9. So, it got cracked sooner than expected.