About Cryptography
“Cryptography comes from the Greek word κρυπτός, kryptos, "hidden, secret"; and γράφω, grαphō, "I write". It is associated with the practice and study of hiding information. (Wikipedia excerpt)
In modern times, cryptography is considered a branch of both mathematics and computer science, and is affiliated closely with information theory, computer security, and engineering. Cryptography is used in applications present in technologically advanced societies; examples include the security of ATM cards, computer passwords, and electronic commerce, which all depend on cryptography…”