Am I misremembering, or was there some cryptographic system where you could set up a container and have two keys to it, each of which provided a different file with no way for anyone to prove the other file/key existed?
ie, if the authorities forced you to decode it, you could give them the fake key and they'd only get the fake contents, and they couldn't prove that you have another key which reveals other contents?
@foone I saw a paper 40 years ago discussing an ALU design that could do the usual operations on words with error correction codes producing a result also with error correction codes.
I just tried to order a pizza and it wanted my credit card expiration date, so I entered "05/28" (example date only)
it then came back with a "your card is expired" error. Uh, no it isn't? that date is still several years in the future.
did... did this site just take my date and assume I mean May of the year AD 28? That is indeed very expired! that's what I get for trying to use Jesus's card.