In this chapter, we jumped right into encryption and created a library of functions for creating hash digests as well as for encryption and decryption using private and public keys, all with a single line of Visual Basic code. In addition, we started securing the employee management system with minimal impact on usability and programming time. This illustrates an important point: if security is complicated to implement or use, people won’t implement or use it. The purpose of this and future chapters is to show you techniques that are simple to bolt onto your existing applications and that have minimal impact on usability.