In a shift cipher, are the letters at the end of the alphabet replaced with letters from the beginning of the alphabet according to modular arithmetic?
The shift cipher, also known as the Caesar cipher, is a classical substitution cipher that forms a foundational concept in cryptography. This cipher operates by shifting each letter in the plaintext by a predetermined number of positions down the alphabet. A critical aspect of this method involves the treatment of letters at the end of
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, History of cryptography, Modular arithmetic and historical ciphers
Do identical plaintext map to identical cipher text of a letter frequency analysis attact against a substitution cipher
In the realm of classical cryptography, particularly when analyzing substitution ciphers, the question of whether identical plaintext maps to identical ciphertext is important to understanding the efficacy and vulnerability of these cryptographic methods. A substitution cipher is a method of encoding by which units of plaintext are replaced with ciphertext, according to a fixed system.
What is a brute force attack?
Brute force is a technique used in cybersecurity to crack encrypted messages or passwords by systematically trying all possible combinations until the correct one is found. This method relies on the assumption that the encryption algorithm used is known, but the key or password is unknown. In the field of classical cryptography, brute force attacks
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, History of cryptography, Modular arithmetic and historical ciphers
How the Enigma machine can be classified in regard to historical ciphers?
The Enigma machine, an electromechanical device used for encryption and decryption, holds a significant place in the history of cryptography. It can be classified as a historical cipher within the context of classical cryptography. The Enigma machine was primarily used by the German military during World War II to secure their communications. In terms of
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, History of cryptography, Modular arithmetic and historical ciphers