I was talking with Lark and one thing I was kicking around was him coming up with like a dozen different encryption ciphers and/or a pile of one time pads
i actually wonder if one-time pads have been developed on Thedas yet. probably not. as a nerd I want to see the conversation where Reaper explains their use.
if you want to die laughing again and haven't seen it before, I can dig up the blizzcon footage of the worlds greatest death blossom from the early development testing