In 404 BC when the Persians conspired to attack the Spartans, a messenger to Lysander of Sparta carried a secret message written upon his belt. Lysander wound this belt around a tapered wooden staff and read the message that enabled him to prepare for,...

Cryptography, the science of encoding communications so that only the intended recipient can understand them, is ancient. In almost every civilization, cryptography appeared almost as soon as there was writing. For example, in 1500 B.C.E. a...

Cryptology is the study of encoding and decoding messages and the study of the mathematical foundations of cryptographic messages. The processes involved in cryptology rely on the principles of mathematics and statistics, and encompass areas such as...

Cryptography is a division of applied mathematics concerned with developing schemes and formulas to enhance the privacy of communications through the use of codes. Cryptography allows its users, whether governments, military, businesses, or...

Cryptography is a division of applied mathematics concerned with developing methods to enhance the privacy of communications and protect data from tampering through the use of coded information. The application of quantum principles to information...

Process of disguising information as “ciphertext,” or data that will be unintelligible to an unauthorized person. Decryption is the process of converting ciphertext back into its original format, sometimes called plaintext (&see;...

Practice of the enciphering and deciphering of messages in secret code in order to render them unintelligible to all but the intended receiver. Cryptography may also refer to the art of cryptanalysis, by which cryptographic codes are broken....

Cryptography (or cryptology; derived from Greek κρυπτÏς kryptós "hidden," and the verb γράφω gráfo "write" or λεγειν legein "to speak") is the practice and study of hiding information. In modern times, cryptography is considered to...