![]() ![]() ![]() One of the earliest and easiest methods of coding message is the substitution cipher, in which each letter in the alphabet is substituted for another letter/number/symbol.Ĭaesar’s cipher is one of the easiest method of coding messages where each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. when an Egyptian scribe used non-standard hieroglyphs in an inscription. The first documented use of cryptograph in writing dates back to circa 1900 B.C. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. Modern cryptography intersects the disciplines of mathematics, computer science, and engineering. Cryptograph is the study of writing in secret code that goes back to ancient times.
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