Today’s blog post is not about an unsolved cryptogram. Instead, I need the help from my readers to solve a mathematical problem. The solution might be helpful to break encryptions.
Three encrypted texts left behind by Nobel Prize winner Richard Feynman are probably the most famous crypto mystery I have never blogged about before. Today, this is going to change.
The Reddit discussion group /r/codes is a forum for cryptographic questions of all kinds. Occasionally, interesting unsolved cryptograms can be found there.
The fifth episode of HISTORY’s Zodiac Killer documentary revealed an alleged solution of the infamous Z340 cryptogram. Does it make sense?
In 2013 the German intelligence service BND published four challenge ciphers. To my knowlege, the solutions have never been published.
In 1935 US president Franklin D. Roosevelt received an encrypted letter from an anonymous person. The solution of the main part is not known.
In 1873 George Furlong, official at the soccer club Luton Town FC, sent an encrypted letter to his sister. Can a reader break this encryption?
A postcard from 1906 is written in a combination of Morse code, numbers, and letters. Can a reader solve this unusal cryptogram?
A blog reader has sent me pictures of a cigaret case from 1909, which bears an encrypted inscription. Can a reader decipher this cryptogram?
A Freemason ritual description from the 19th century is encrypted in two different ciphers. Can a reader find the solutions?
Letzte Kommentare