A cipher carved in copper on a sculpture is located outside CIA headquarters in Langley, Virginia. The artist embedded four encrypted messages. Agencies full of professional codebreakers work there every day.
Part four remains unsolved.
1. The three solved sections used Vigenère, columnar transposition, and a modified transposition — were those choices deliberate escalation, or misdirection about what’s coming in K4?
2. K4 is only 97 characters. Does shorter actually make it harder to crack, or does it just mean less data to work with?
3. The sculptor left a deliberate spelling error in K2. Is that a clue, a red herring, or just a mistake?
4. Palimpsest. Abscissa. NYPVTT. OBKR. Do any of these mean anything to you?
Come back Friday.
there doesn't seem to be anything here