The CIA doesn't have the authority to criminalize "protest-plans.ppt". They're part of the executive branch. To criminalize protest plans, Congress would need to pass a law, one that at the very least left room for executive branch rulemaking about which slide decks were or weren't criminal. And, of course, that law would not survive in court.
Of course, you aren't talking about outlawing documents. You're suggesting a different case, one in which hashes of documents are used not for criminal investigations but to keep tabs on citizens. But that wasn't the case I was responding to.
Of course, you aren't talking about outlawing documents. You're suggesting a different case, one in which hashes of documents are used not for criminal investigations but to keep tabs on citizens. But that wasn't the case I was responding to.