Following this tutorial look for two related cryptology tutorials. In this part, we have addressed the basic concepts of cryptology; tutorial users should now understand the meaning of concepts like symmetric and asymetric algorithms, key-length, cryptanalysis, and algorithms/protocols. Part 2 will address symmetric and asymmetric (public-key) algorithms in terms of the basic mathematical principles of their construction. Part 3 will move on to describe a number of actual protocols, many of which use the algorithms described in part 2 as their building blocks. After completing all three tutorials, users should have an excellent foundation for constructing working cryptosystems that are tailored to their specific requirements.