code-breaking

Code-breaking, also known as cryptanalysis, is the practice of deciphering secret codes to make messages understandable to unintended recipients. This involves transforming messages to conceal their meaning, using either transposition (rearranging elements) or substitution (replacing elements).12

Historically, manual methods were used until World War I. The mechanization of cryptography began after World War I with rotor machines, like the German Enigma used in World War II, which significantly increased complexity and speed. The development of electronic computers further revolutionized code-breaking, with machines like Colossus being instrumental in deciphering German communications during World War II. Modern cryptology extends to digital signatures and authentication, leveraging advancements in microcircuitry and computer technology.3452