That's an issue that's mostly irrelevant to the law, though. Even if you were to receive XOR'd data (or something encrypted), simple possession wouldn't be ille

That's an issue that's mostly irrelevant to the law, though. Even if you were to receive XOR'd data (or something encrypted), simple possession wouldn't be illegal if you reasonably weren't aware that it could be interpreted that way, or (as someone else pointed out) at least in the UK you didn't have the "knowledge or tools" for such a decryption. Intent obviously matters here, among a host of other factors. That was really my point all along - viewing this as detached from the actual workings of the law and situations is a fun mind game for hackers, but is ultimately irrelevant when it comes to human judges interpreting human laws.