A dress from the 1880s had a hidden pocket and an unbreakable code. The silk dress cryptogram was recently broken, but some ...

Another popular type of cryptogram puzzle is the number-to-letter cipher, known as a Polybius cipher, because its invention is attributed to the Greek historian Polybius (c. 200-c. 118 BCE). One ...

"Bismark Omit leafage buck bank." That seemingly random string of words appears in something called the Silk Dress cryptogram, 23 handwritten lines on two sheets of crinkled paper that were discovered ...

A secret code hidden in the pocket of a 19th century silk dress was one of the world’s unsolved mysteries. A researcher from Manitoba figured it out A mysterious code written in the late 1800s gripped ...