COMPUTER FUNDAMENTALS

Detailed explanation-1: -The Advanced Encryption Standard (AES) is a symmetric block cipher chosen by the U.S. government to protect classified information. AES is implemented in software and hardware throughout the world to encrypt sensitive data. It is essential for government computer security, cybersecurity and electronic data protection.

Detailed explanation-2: -Advanced Encryption Standard (AES) – an encryption algorithm, selected by NIST after a public competition. In 2003, NSA certified AES for Type 1 use in some NSA-approved systems. Secure Hash Algorithm – a widely used family of hash algorithms developed by NSA based on earlier designs by Ron Rivest.

Detailed explanation-3: -Rijndael is an iterated block cipher, meaning that it encrypts and decrypts a block of data by the iteration or round of a specific transformation. It supports encryption key sizes of 128, 192, and 256 bits and handles data in 128-bit blocks.

Detailed explanation-4: -LEA is a block cipher with 128-bit block. Key size is 128-bit, 192-bit, and 256-bit.

Detailed explanation-5: -A machine that can crack a DES key in a second would take 149 trillion years to crack a 128-bit AES key. Hence, it is safe to say that AES-128 encryption is safe against brute-force attacks. AES has never been cracked yet and it would take large amounts of computational power to crack this key.