A block cipher is a type of symmetric cipher used to protect data stored or transmitted over a network. It operates on a chunk of data at once, unlike a stream cipher which operates on a single bit at a time. The Advanced Encryption Standard (AES) is a well-known example of a block...
(Data Encryption Standard) to illustrate block cipher design principles *3.0 simplified DES – S-DES Input : 8 bits plaintext Key: 10 bits Output:8 bits ciphertext Encryption Algorithm: 5 functions Initial Permutation: IP complex function: fk simple permutation function: SW complex function: fk ...
Since a mistake in the translation of one bit often does not affect the entire plaintext block, stream cipher encryption algorithms are less likely to cause system-wide errors to spread. Additionally, stream encryption is linear and continuous, making it easier and quicker to deploy. However, st...
An encryption function per Definition 7.1 is a deterministic mapping. Each pairing of plaintext block P and key K maps to a unique ciphertext block. In contrast, in a randomized encryption technique (Definition 7.3; see also Remark 8.22), each (P, K) pair is associated with a set C(P,...
This paper describes the design principles, the specification, and evaluations of a new 128-bit block cipher E2**, which was proposed to the AES (Advanced Encryption Standard) candidates. This algorithm supports 128-bit, 192-bit, and 256-bit secret keys. The design philosophy of E2 is highly...
Chaotic maps have good potential for information encryption. In this paper, a block cipher based on the chaotic standard map is proposed, which is composed of three parts: a confusion process based on chaotic standard map, a diffusion function, and a key generator. The parameter sensitivity of...
TDEA (64 bits data block): Triple Data Encryption Al- gorithm. TEA (64 bits data block): Tiny Encryption Algorithm. 3.1. Developing Principles Following principles guide the development of block-cipher library, (1)Fully pipelined. All the intermediate data and their related subkeys are registere...
In this paper, we propose a new stream cipher construction based on block cipher design principles. The main idea is to replace the building blocks used in block ciphers by equivalent stream cipher components. In order to illustrate this approach, we construct a very simple synchronous stream cip...
TheStream ciphers and the Block ciphersboth are a type of encryption technology that differs by how the plain text is converted into ciphertext. It should be noted that both the stream ciphers and the block ciphers are a type of symmetric-key cryptography technique. ...
Camellia: A 128-Bit Block Cipher Suitable for Multiple Platforms — Design andAnalysis We present a new 128-bit block cipher called Camellia . Camellia supports 128-bit block size and 128-, 192-, and 256-bit keys, i.e., the same interface specifications as the Advanced Encryption Standard ...