Eviden’s Digital Identity INSIGHTS | ISSUE #01

Unsolved Encryption Mysteries: the mysterious postcard

Author: Klaus Schmeh, Eviden Digital Identity

Welcome to our new column, dedicated to unraveling unsolved encryption puzzles. Each month, we will present a different encrypted message that has thus far resisted all attempts at decryption. Today, we begin with a puzzling historical enigma: a cryptic postcard sent in 1873.

The Era of Encrypted Postcards

In the early 20th century, encrypted postcards were a common way to communicate secret messages, especially among young couples. With the telephone still not widespread, postcards were a popular means of correspondence, offering a quick way to send messages across distances. However, not everyone was comfortable with the idea of their private words being read by postmen or curious family members. As a result, many turned to encryption as a way to safeguard their secrets.
Though the majority of surviving encrypted postcards are relatively simple to decode today, one particular postcard has baffled cryptographers and historians for over a century.

Despite many attempts over the years, no one has yet succeeded in cracking the code on this postcard.

The mysterious postcard from George Furlong

This postcard, sent by football official George Furlong from Luton, England, to his sister Lizzie in 1873, has been the subject of numerous decryption attempts—none of which have been successful. The handwriting on the card is smooth and fluid, suggesting that the sender was proficient in this particular script. What makes this postcard especially intriguing is that no other examples of writing in this style have been found, leaving many questions unanswered.

The enigma of the message

What exactly is going on with this message? The postcard seems to be written in some form of cipher or a secret script, but it remains unclear whether this was an intentional encryption or simply a rare, obscure form of handwriting. Another question is whether the message is written in English or some other language—perhaps a code or dialect that has long since fallen out of use.

A particularly puzzling aspect of the postcard is the arrangement of certain letters, which appear stacked or layered on top of one another. What purpose could this serve? Was it simply a stylistic choice, or does it play a role in the encryption? Furthermore, was George Furlong trying to hide a deeply personal message, or was there another reason for his choice of writing? These questions remain unanswered, and the meaning of the card is still shrouded in mystery.

Can you help?

Despite many attempts over the years, no one has yet succeeded in cracking the code on this particular postcard. If you think you can help solve this puzzle, or if you have any thoughts on what might be behind this cryptic message, please get in touch.

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