
2 Introduction
how to use the tools that will allow you to protect your confi-
dential information while sharing it as you desire.
This book is not meant to be the definitive tome on the
subject. It will not teach you how to compute public encryption
keys by hand, nor will it survey all the encryption algorithms
and techniques available today. However, it will teach you
enough about the ideas behind encryption and digital sig-
natures that you’ll be able to make intelligent choices about
which of the available options you should use in any given cir-
cumstance. I’ll demonstrate how to integrate encryption and
digital signatures with popular email ...