I like Anonymous E-cash or True Digital Cash better the term blockchain speaks mostly to those in this arena and many of them know that Aeon is untraceable already and if not they will find out soon after and at that point it's not better than True Digital Cash or Anonymous E-cash. True digital cash has a larger audience. Also the blockchain is tracable, I found it through this thread  

Apart from this if you're also looking for a slogan - none of these are slogans.