From the course: Symmetric Cryptography Essential Training
Join today to access over 22,600 courses taught by industry experts or purchase this course individually.
The Advanced Encryption Standard (AES)
From the course: Symmetric Cryptography Essential Training
The Advanced Encryption Standard (AES)
- [Instructor] In 1997, the National Institute of Standards and Technology, NIST, started a process of developing a new encryption standard to replace the aging DES. This process would help them develop the Advanced Encryption Standard, or AES. Five AES finalists were chosen from submissions all around the world. The final algorithm that was chosen, Rijndael, came from two Belgian cryptographers. All else equal, it's useful to look at how much better AES's 128 bit key is compared to DES's 56 bit key. It would take two to the 56 operations to check all possible DES keys. Because AES keys can start at 128 bits, and can be up to 256 bits, it would take between two to the 128th to two to the 256th operations to check them all. If we're checking about a billion keys per second on a fairly slow computer, it would take more than 2,000 years to check every possible DES key, and we call this sort of attack, where you try all the possible keys a brute force attack. And then even with the…
Practice while you learn with exercise files
Download the files the instructor uses to teach the course. Follow along and learn by watching, listening and practicing.
Download courses and learn on the go
Watch courses on your mobile device without an internet connection. Download courses using your iOS or Android LinkedIn Learning app.