Five years ago I asked my readers for information about seven little-known cryptograms created by criminals. Meanwhile, I’m a little wiser, but I still would like to know more about some of these encrypted messages.

Victor Lustig (1890-1947), “the man who sold the Eiffel tower”, was a successful con artist. In 1935, master codebreaker William Friedman was asked to break an encrypted message Lustig had in his possession.

Here are ten criminals who used encryption – including the notorious Unabomber.

Schon so mancher Mörder, Entführer oder Betrüger nutzte Verschlüsselung. Leider gehen viele Quellen nur am Rande darauf ein. Heute stelle ich sechs verschlüsselte Nachrichten von Kriminellen vor, deren Inhalt mir nicht bekannt ist. Vielleicht wissen meine Leser mehr.