From the Words of a Serial Killer to the Secret Messages of Soldiers, Cryptic Texts That Cannot Be Solved Even Today There are many unsolved mysteries in the world! Despite centuries of research and cryptanalysis, there are still many encrypted texts whose mysteries cannot be solved. Source: https://news.sophos.com/en-us/category/serious-security/ 1. Dorabella — 1897, United Kingdom Famous English composer Sir Edward Elgar included an encrypted message consisting of 87 symbols in a letter he sent to his close friend Dora Penny (Dorabella). No one, including Dorabella, could understand what was written in this letter. The same symbols were found in Elgar’s 1886 Liszt concert programme. Additionally, the same symbols were found in a notebook of Elgar’s from the 1920s. 2. Beale Papers — 1885, Virginia, USA These documents reportedly give the location of hidden treasure discovered by Thomas J. Beale and buried somewhere in Virginia in 1820. The documents consist of three cipher...