Online AES-256 Data Encryption
Upload a file or enter your text directly to encrypt with AES-256 algorithm.
AES is a symmetric block cipher. AES performs operations on bytes of data rather than in bits. AES relies on substitution-permutation network principle which means it is performed using a series of linked operations which involves replacing and shuffling of the input data.
The first transformation in the AES encryption cipher is substitution of data using a substitution table. The second transformation shifts data rows. The third mixes columns. The last transformation is performed on each column using a different part of the encryption key. Longer keys need more rounds to complete.
AES use symmetric, which known as secret key. The sender and the receiver must both know secret and use the same secret key. The longer the secret key, the harder it is for an attacker to guess via brute force attack.
AES-256 algorithm use 14 rounds for encryption. A round consists of several processing steps that include substitution, transposition and mixing of the input plaintext to transform it into the final output of ciphertext.
A 256-bit encryption key is significantly more difficult for brute-force attacks to guess than a 128-bit key, because it take longer time to execute and require more processing power.