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== Classical Cryptography: Foundations of Secure Communication == ...]]. This article explores the principles, evolution, and lasting impact of classical cryptography.

...g, “I want to trade Bitcoin futures, why do I need to understand codes and ciphers?” The answer is simple: the entire foundation of cryptocurrencies, and th ### 1. Introduction to Cryptography & Classical Ciphers

...specifically messages sent to his generals. However, simple substitution ciphers were likely in use even before Caesar’s time. The specific method attrib [[Category:Classical ciphers]]

...). Historically, cryptography involved simple techniques like substitution ciphers – replacing letters with other letters or symbols. Modern cryptography, h ...CC. PQC aims to develop algorithms that are resistant to attacks from both classical and quantum computers. NIST (National Institute of Standards and Technolog

* **Classical Cryptanalysis:** These attacks target pre-computer era ciphers and are less relevant to modern cryptocurrency security, but provide a hist

...Modes || [[CBC]] (Cipher Block Chaining) || A mode of operation for block ciphers that adds security by chaining together the encryption of each block with t ...ographic algorithms that are believed to be resistant to attacks from both classical and quantum computers.