This book investigates the development, implementation, and societal impact of Pretty Good Privacy (PGP), a powerful encryption program.

Simson Garfinkel's "PGP" is recognized as a foundational text for understanding the practical and theoretical aspects of public-key cryptography as embodied by PGP. The book delves into the technical intricacies while also addressing the broader societal implications and controversies surrounding its use. It serves as a key resource for those seeking to grasp the significance of encryption in the digital age.