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Italian crypto history expert Paolo Bonavoglia has forwarded me a 19th century shorthand note from Italy. Can a reader decipher it?

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Two years ago, I blogged about five encrypted 19th century newspaper ads that contain Bible references. Blog reader Thomas Ernst found an interesting solution approach, but so far nobody has deciphered these cryptograms.

Wien-RKA-K1-bar

Peter Nüchterlein, the writer-in-residence in Wernigerode, Germany, has asked me for help. In a Vienna archive he has found over 100 encrypted documents from the Thirty Years’ War. Today, I am going to introduce five of them. Can a reader decipher them?

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Can you decipher this encrypted graffiti that was found near Rome, Italy? The encryption method used looks like a Pigpen variant.

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A message written 118 years ago in Aldino, Maryland, waits to be solved. Can you break this cryptogram?

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The Vernam cipher is mentioned in dozens of cryptography books. It is simple and more secure than most other basic encryption methods. Can you solve the three Vernam challenges I am going to introduce today?

New-York-Poster-bar

An advertisment poster an Instagram user has seen in a New York subway is completely encrypted. Can you decipher it? And can you tell me what is behind the “spiritual consultancy” that has published this poster and a few others?

Diary-Flowers-bar

Can a reader decipher this encrypted diary page I found on the internet? I don’t know by whom and when it was written, but I’m sure that it can be solved.

Family-Member-bar

A Reddit user has posted an encrypted note he found in a family member’s personal effects. The cleartext is not known. Can you solve it?

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Stephen Hawking, the world-famous physicist who died earlier this year, has left behind ten puzzles. One of these has now been published. It looks like a cryptogram.