Enigma Machine Enthusiast Insists On Sending Party Invitations Via Rotor Cipher

A World War II cryptography enthusiast has sent invitations to his 40th birthday party encrypted using a replica Enigma machine, requiring recipients to decode three-rotor polyalphabetic substitution ciphers to learn the date, time, and location of the event. Elliot Turing-Wren, a software engineer and collector of historical cipher devices, mailed 35 invitations on card stock, each containing a sequence of encrypted text, a rotor setting hint ("Reflector B, Ring Setting: my birth year minus 1940"), and a handwritten note reading "Looking forward to seeing you there!" without specifying where "there" is. "The Enigma machine represented the pinnacle of pre-digital encryption," Turing-Wren explained. "I wanted my birthday to honor that legacy. Also, I thought it would be fun. I was wrong about the second part." Of the 35 recipients, four successfully decoded the invitation. Twenty-two texted Turing-Wren's wife to ask what was going on. Six ignored the invitation entirely, assuming it was a marketing mailer from a puzzle subscription service. Three attempted to decode it but arrived at incorrect plaintext due to rotor-setting errors, with one guest showing up at what she believed was the correct address but turned out to be a Subway restaurant. Turing-Wren's wife, Patricia, who received her own encrypted invitation despite living in the same house, has described the experience as "on brand" and "the reason I handle all other household communications." The four guests who successfully decoded the invitation have formed what they describe as "a bond forged in cryptanalysis" and have requested that all future social events include a cipher challenge. The remaining guests have requested that all future social events include a readable date and address. Turing-Wren is already planning next year's party, which he says will feature invitations encrypted using the Lorenz SZ40 cipher. His wife has pre-emptively created a Facebook event as backup.