Cryptomenytices-Music-bar

Crypto history expert Prof. Gerhard Strasser once wanted to test if a musical cryptogram from the 17th century really sounded like music. Here’s the result.

Soccer-Coin-bar

A German memorial coin minted in 2011 bears a hidden code. Maybe my readers can help me to find out more about it.

Reality-Winner-bar

Earlier this year I blogged about Printer Identification Codes, which are one of the IT world’s best-kept secrets. As it seems, a US secret service has now used this technology to track down a whistleblower.

Fashion-Censorship-2-bar

In a British censorship manual from WW2 two pictures containing hidden messages are displayed. Many have tried to find these messages, but up until now with no success.

Yellow-dots-bar

Many color laser printers add tiny yellow dots to each page they print. These dots encode a timestamp, the printer serial number and potentially additional information. Although these dot codes have been around for at least 25 years, not much is publicly known about them.

Starlight-Steganogram-bar

The last crypto challenge I’m going present in 2016 was created by master-codebreaker Tony Gaffney. Can you solve his starlight steganogram?

Friedman-Music-bar

Forget about all the Christmas carols! Here comes the Friedman’s musical cryptogram from 1933, as played by a scorewriter.

Friedman-Bacon-Castle-bar

William Friedman, one of the most notable cryptologists in history, used a 16th century stegnography system to hide messages in pictures. Some of his codes are hard to decrypt. Maybe a reader can help.

Music-bar

17th century polymath Daniel Schwenter invented a secret writing method based on musical notes. Can a reader solve a musical cryptogram encrypted in this system?

Chess-2-bar

While in New York Carlsen and Karyakin are playing their final games, I am going to present three (alleged) secret codes related to chess.