With this fun challenge, brought to you in partnership with the Science Museum Group, you and your child can learn how to make a cipher wheel together and use it to send secret messages to one ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher.

Cipher Mining Inc (NASDAQ:CIFR) shares are trading higher in Tuesday’s after-hours session after the Bitcoin (CRYPTO: BTC) ...

Called, 'This is not a website,' the website was first spotted in the back of a book on one of the characters in the series, Bill Cipher ... trying to decode the puzzle for days.