From the course: Learning Cryptography and Network Security
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Work with AES
From the course: Learning Cryptography and Network Security
Work with AES
- [Instructor] Over 20 years after the implementation of the Data Encryption Standard, NIST issued a request for proposal for an encryption algorithm to replace DES as a government standard. Requirements included many of the same original requirements such as it needed to be an efficient, flexible, and simple symmetric block cipher. However, new requirements specified the algorithm needed to support a block size of 128 bits and support key length of 128, 192, and 256 bits. It also had to be available on a worldwide, non-exclusive, royalty-free basis. Over a dozen participants published algorithms. The Rijndael algorithm was selected, and this then became the official Advanced Encryption Standard. AES is used in all modern applications, including wireless security. AES is not a Feistel network in that it does not swap sides, it processes the entire block through a set of four operations, from nine to 11 rounds…
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