Elizebeth Smith Friedman and one example of a prohibition era encryption system
Department or Administrative Unit
A short ciphertext message encrypted using a Prohibition era encryption system is examined. First published in David Kahn’s The Codebreakers, this example appears in two early reports written by Elizebeth Smith Friedman. Some obvious and some not so obvious errors are identified and corrected when possible. Friedman’s cryptanalysis of the ciphertext is given.
Boersma, S. (2022). Elizebeth Smith Friedman and one example of a prohibition era encryption system. Cryptologia, ahead of print. https://doi.org/10.1080/01611194.2021.2003913