Suchergebnisse für „25“
The homophonic Polybius is a simple but hard to break manual cipher. Can a reader break a message I have encrypted in this scheme?
A cipher disk introduced on Reddit looks like a mass-produced item from the 20th century. Does a reader have any information about this crypto tool?
The cover of a well-known cryptography book shows a 16-letter cryptogram. Its solution is unknown.
Gravestones bearing an encrypted or hidden message are rare, and they have a morbid charm. On Reddit, I have found one I hadn’t known before. I have no idea where it is located and what the inscription means.
In 1888, an encrypted advertisement was published in the “Daily Chronicle”. Can a reader decipher it?
The Voynich Manuscript is the most famous unsolved crypto mystery in the world. For this reason, I put it at the first position of my top 50 list.
Two years ago, I blogged about a beautiful encrypted postcard sent by a man named Fritz to his lover Leni. A blog reader has now made aware of a similar card from the same sender.
A British scientist has discovered four paper sheets that were originally a part of the Voynich Manuscript. This exciting find might finally lead to a reliable dating of the mysterious book.
The picture series I introduced in my last post contains a photograph of a 1930s electronic machine. It seems completely unknown how it was used and if it was a cipher machine at all.
Edward Hebern was a bustling, yet successless constructor of cipher machines. The Smithsonian Institution has put a number of photos of these devices into the public domain.
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