Does the security of block ciphers depend on combining confusion and diffusion operations many times?
Monday, 26 May 2025 by Theresa Sittel
The security of block ciphers is fundamentally rooted in the iterative application of confusion and diffusion operations. This concept was first formalized by Claude Shannon in his seminal work on communication theory of secrecy systems, where he articulated the necessity for both confusion and diffusion in cryptographic systems to thwart statistical and structural attacks. Understanding
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Applications of block ciphers, Modes of operation for block ciphers
Tagged under: AES, Block Ciphers, Confusion, Cryptanalysis, Cybersecurity, DES, Diffusion, Shannon Principles

