Cryptology

Cryptology is the study of techniques for secure communication in the presence of adversarial behavior. Modern applications of cryptology include secure financial transactions, secure network communications, and secure storage of sensitive information. Cryptology has deep roots in number theory, algebra, and computer science, as well as information theory. Because of its inherent mathematical nature, it is a popular topic with hobbyists. Cryptology is a highly specialized field that requires years of study and practice to master.

What is Cryptology?

Cryptography is the practice and study of techniques for secure communication in the presence of adversarial behavior. Modern applications of cryptography include secure financial transactions, secure network communications, and secure storage of sensitive information. Cryptographers design and analyze protocols that prevent unauthorized parties from accessing private messages. Cryptographic methods are employed in electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.

Historically, cryptography referred almost exclusively to encryption, the conversion of information from a readable state to an incomprehensible one. Decryption is the reverse, converting the incomprehensible back to a readable state.

History of Cryptology

The history of cryptography dates back to the earliest forms of writing. The first known use of cryptography was by Julius Caesar around 100 B.C. Caesar used a simple substitution cipher to encrypt military messages. Substitution ciphers involve replacing each letter of the plaintext with another letter.

In the 15th century, the development of more complex ciphers began, such as the Vigenere cipher. By the 19th century cryptography became more mathematical, with the development of more sophisticated techniques for breaking codes.

Applications of Cryptology