Computing 0-day Clothing
Dear Bob. Please, let yourself in. Private key is under the mat. I hope you didn't find any collisions on your way here, world is full of untrusted third-parties nowadays. Make yourself at home and help yourself with any of my key exchange protocols and subliminal channels. Sorry I couldn't be here in person. Let's meet in the middle next time. Yours, Alice.
Bitcoin Cipher block rights! In Math We Trust Alice, Bob, Eve... The Proposal Trust the Math