25 Famously Unsolved Ciphers And Codes That You Won’t Be Able To Break

From ancient languages to modern cryptographic challenges released by government agencies like the CIA these are 25 famously unsolved ciphers and codes that you won’t be able to break.

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Beale Ciphers

unsolved ciphers and codes

In 1885 a small pamphlet was anonymously published in Virginia containing a story and three encrypted messages. The story claimed that the messages led to a treasure buried by a man name Beale. Only one of the messages was ever solved.


Voynich Manuscript

unsolved ciphers and codes

Estimated to be at least 600 years old this 232 page manuscript is written in some sort of undecipherable language. It features numerous pictures of unidentified plants and people in strange plumbing like contraptions.


Zodiac Killer Ciphers

unsolved ciphers and codes

Between 1966 and 1974 the Zodiac serial killer sent more than 20 encrypted messages to police. Most have been cracked but a few remain unsolved.



unsolved ciphers and codes

In 1990 a sculpture with 4 sections of encrypted characters was installed at CIA headquarters as a challenge to the employees of the agency. 3 sections have been decrypted but a fourth is still not solved.


Dorabella Cipher

unsolved ciphers and codes

In 1897, the well-known composer Edward Elgar (of “Pomp and Circumstance” fame) sent an encrypted message to a 23-year-old friend, Miss Dora Penny. To this day, it still has not been solved

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