Cryptography contests | Advanced Encryption Standard

Advanced Encryption Standard process

The Advanced Encryption Standard (AES), the symmetric block cipher ratified as a standard by National Institute of Standards and Technology of the United States (NIST), was chosen using a process lasting from 1997 to 2000 that was markedly more open and transparent than its predecessor, the Data Encryption Standard (DES). This process won praise from the open cryptographic community, and helped to increase confidence in the security of the winning algorithm from those who were suspicious of backdoors in the predecessor, DES. A new standard was needed primarily because DES has a relatively small 56-bit key which was becoming vulnerable to brute-force attacks. In addition, the DES was designed primarily for hardware and is relatively slow when implemented in software. While Triple-DES avoids the problem of a small key size, it is very slow even in hardware, it is unsuitable for limited-resource platforms, and it may be affected by potential security issues connected with the (today comparatively small) block size of 64 bits. (Wikipedia).

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Advanced Encryption Standard (AES)

Fundamental concepts of Advanced Encryption Standard are discussed. Basic structure of AES is presented. AES Decryption is explained. AES Structure AES Round Function AES Key Expansion AES Decryption

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Square (cipher) | CRYPTON | Twofish | FROG | Serpent (cipher) | NIST hash function competition | MARS (cipher) | CAESAR Competition | Block cipher | DFC (cipher) | Hasty Pudding cipher | RC6 | Cryptanalysis | LOKI97 | Brute-force attack | E2 (cipher) | CAST-256 | SAFER | MAGENTA | DEAL | Advanced Encryption Standard | Data Encryption Standard