What are block ciphers and how do they differ from stream ciphers in terms of data encryption?
Wednesday, 12 June 2024
by EITCA Academy
Block ciphers and stream ciphers are fundamental concepts in the field of cryptography, specifically under the branch of symmetric key encryption. Both are employed to secure data, but they operate in fundamentally different ways, each with its own set of advantages and disadvantages. Understanding these differences is crucial for selecting the appropriate encryption method for
- Published in Cybersecurity, EITC/IS/CCF Classical Cryptography Fundamentals, Applications of block ciphers, Modes of operation for block ciphers, Examination review
Tagged under:
AES, Block Ciphers, CBC, CTR, Cybersecurity, Encryption Modes, RC4, Stream Ciphers, Symmetric Key Encryption
Describe the process of encryption using AES, including the key expansion process and the transformations applied to the data during each round.
Thursday, 03 August 2023
by EITCA Academy
The Advanced Encryption Standard (AES) is a widely used block cipher cryptosystem that employs symmetric key encryption. AES operates on fixed-size blocks of data, typically 128 bits, and uses a variable-length key of 128, 192, or 256 bits. The encryption process involves several steps, including the key expansion process and a series of transformations applied