3 ms·
I've wondered about doing this before for copy protection; mixing the order of bullet points, and so on. You can't stop copies, but you can see who made the cop
by peteretep 11y ago
I've wondered about doing this before for copy protection; mixing the order of bullet points, and so on. You can't stop copies, but you can see who made the copies potentially.
- edmccard 11y ago>I've wondered about doing this before for copy protection Something similar -- using functionally-equivalent machine language instructions instead of synonyms -- was (is?) used by the shareware A86 assembler[1] to detect unregistered use. From the A86 manual: A86 takes advantage of situations in which more than one set of opcodes can be generated for the same instruction. [...] A86 adopts an unusual mix of choices in such situations. This creates a code-generation "footprint" that ... will enable me to tell ... if a non-trivial object file has been produced by A86. [1] http://eji.com/a86/ http://eji.com/a86/