Cryptography is the process of hiding or coding information so that only the person a message was intended for can read it. The art of cryptography has been used to code messages for thousands of years and cont
Learn about cryptography, the process of encoding data, including types of cryptography, current algorithms, challenges, and types of algorithms used in the process.
In a Feistel structure, a round function is run iteratively a certain fixed number of times inside the algorithm. In each round, the plaintext is processed using a substitution step and permutation step. In the case of Blowfish, each iteration operates on a 64-bit block that's split into ...
The ciphertext is the ‘secret code’ to hide the true meaning of the information. To encrypt and decrypt information, one should be knowledgeable about cryptography. Effective encryption makes use of a variable or key as part of the formulas or algorithms. When an unauthorized person tries to...
While the objective of cryptanalysis is to find weaknesses in or otherwise defeatcryptographic algorithms, cryptanalysts' research results are used by cryptographers to improve and strengthen or replace flawed algorithms. Both cryptanalysis, which focuses on deciphering encrypted data, and cryptography, whi...
AES encryption is a symmetric cryptography algorithm. This means that the encryption and decryption process uses the same key for both processes. AES has been the standard for symmetric encryption for the last few decades, and is still widely used today for its secure encryption capabilities. AES...
Secure Shell Protocol (SSH): SSH is known as the ssh-keygen program in its open-source format. It helps connect SSH clients to SSH servers through both asymmetric and symmetric cryptography. Asymmetric cryptography is used for initial identification and connection setup, whereas symmetric cryptography...
DEA is the standard deterministic algorithm in cryptography. Each and every block size of DEA is 64 bits. The structure of the DEA algorithm consists of 16 identical stages of processing, named rounds. The Feistel(F) function of crisscrossing Feistel structure (whose block classified into two 32...
The matrix shown in the image above is known as a state array. Similarly, the key being used initially is expanded into (n+1) keys, with n being the number of rounds to be followed in the encryption process. So for a 128-bit key, the number of rounds is 16, with no. of keys ...
In the following sections, I will briefly explain the main idea behind the cryptography of AES. 1. Dividing data into blocks First, we have to keep in mind that AES is ablock cipher. Unlike stream ciphers, it encrypts data inblocks of bitsinstead of bit-by-bit. ...