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.

Anna created the next challenge:

 

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:

Quelle/Source: Tenzer