The Friedman Ring is a series of cryptographic challenges named for William and Elizebeth Friedman.
The first challenge: Frank Schwellinger
The challenge that was later declared the first one in the Friedman Ring series was created by Frank Schwelliinger.
April 2021 – July 2021: Anna Salpingidis and Christoph Tenzer
Anna Salpingidis and Christoph Tenzer solved Frank Schwellinger’s challenge and so became the first bearers of the Friedman Ring.
July 2021 – August 2021: Armin Krauß
Armin Krauß solved Anna’s challenge and became the second bearer of the Friedman Ring.
Armin created the next challenge:
August 2021 – now: Christoph Tenzer
Christoph Tenzer solved Armin’s challenge and became the third bearer of the Friedman Ring.
Christoph created the next challenge:
The cryptogram is also available as an image: