UNSOLVED PROBLEMS

In Number Theory, Logic, and Cryptography

Dorabella Cipher

 

The Dorabella cipher is contained in a note written by the English composer Sir Edward Elgar to a young lady companion, Dora Penny, in 1897.  The cipher remains unsolved to this day.

 

 

 

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The problem is to solve the cipher..

 

For further information, please see:

[1] http://en.wikipedia.org/wiki/Dorabella_Cipher

[2] http://www.puzzlehead.org/2009/05/unsolved-mysteries-the-dorabella-cipher

 

The Dorabella Cipher has now been solved.  See items 12 and 36 on the Solutions page.

 

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This web site developed and maintained by

Tim S Roberts

Email: timro21@gmail.com

 

 

 

 

 

 

 

* There are currently 2 proposed solution on the solutions page.