Back story:
That would be Professor Matt Blaze, McDevitt Chair of Computer Science and Law at Georgetown University, whose prior publications on hardware lock security have infuriated professional locksmiths and their trade journal (The National Locksmith) subscribers.
During his 14 year stay at U.Penn, the campus locksmith repeatedly lobbied to have him fired for teaching about locks and cryptographic concepts.
My apologies for being the slayer of jokes. But, the longest message you could encode on a key the size of the universe, using a precision of 1 Planck length, is only 61 digits long.
and here I was taking mine all the way home to get them copied… I knew that my NYC locksmith wouldn’t care about the message but I was more wary of a local one alerting “the authoraties.” HA!