A document properly encrypted with AES or similar modern methods would be considered "strong crypto" (using the article/'90s political terminology) and would be

A document properly encrypted with AES or similar modern methods would be considered "strong crypto" (using the article/'90s political terminology) and would be infeasible with current computing power to crack (assuming AES does not have a major vulnerability/backdoor, which has yet to be discovered by the top security researchers who depend on it). As tptacek and others frequently say: "Crypto is hard to do right". There is sufficient encryption technology to evade the NSA (at this point in time) but the social-engineering aspects and difficulty confirming a bug-free, secure implementation present the most issues.