A postcard from 1910 is encrypted in three different ciphers. Can a reader solve this unusual cryptogram?
In 1907 an encrypted postcard was sent from Box, UK, to nearby Chippenham. Can a reader decipher this note?
In 1906 an unknown person sent an encrypted postcard from St. Petersburg, Russia, to Vaasa, Finland. Can a reader decrypt it?
During World War II a woman from Loiret, France, sent an encrypted message to a recipient in Nantes, France. Can a reader break this cryptogram?
The new year begins with six encrypted postcards from the 19th century. They were provided to me by the National Cryptologic Museum. Can a reader decipher them?
In 1905 a woman named Elena Moga received an encrypted postcard. Can a reader break this cryptogram?
In 1906, an unknown person sent two beautiful postcards encrypted in a pigpen cipher to a man in Kent. Can a reader solve these two postcard cryptograms?
Two more encrypted postcards wait to be solved. Can a reader help?
A number of encrypted postcards from different times and places wait to be solved. Can a reader help?
Three encrypted postcards from San Francisco are discussed in an internet forum. The solutions still seem to be unknown. Can a reader of this blog help?