So far, we have covered integrity by looking at hashing, and authentication by looking at hashed message authentication codes. In this chapter, we explore confidentiality by looking at symmetric encryption .
First, we look at the history of the Data Encryption Standard (DES) and its immediate successor, Triple DES. While DES and Triple DES are not recommended for use in new applications, it is still necessary to discuss them because you may need to integrate with legacy systems that still rely on them. Once we cover DES and Triple DES, we take a look at their ...
