The Dorabella cryptogram, an encrypted message left behind by British composer Edward Elgar, is one of the most famous crypto mysteries in the world. Here are two more crypto mysteries Elgar created. They have not received much attention so far.
At the HistoCrypt 2018 I presented a poster about an analysis of the Dorabella Cryptogram. Here are the details of this work.
The Dorabella Cipher is one of the most popular crypto mysteries in the world. 120 years after its creation still nobody has found the solution.