Take a look at some form of musical score, you will notice that at the beginning of every line, there are a collection of signs made up of either hash-tag signs, or lowercase letter b’s (unless ...

1947), Leonard Adleman (b. 1945), and Adi Shamir (b. 1952) set to work on the problem of finding a public-key cryptosystem suitable for both the key distribution and digital signature problems.

This is used when writing a melody. Each key signature has two possible keys. The major key and the minor key, which will begin on a different note. This is known as the relative minor.