Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, information security, electrical engineering, digital signal processing, physics, and others. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Lorenz cipher machine, used in World War II to encrypt communications of the German High CommandĬryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret" and γράφειν graphein, "to write", or -λογία -logia, "study", respectively ), is the practice and study of techniques for secure communication in the presence of adversarial behavior.
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