Security Without Obscurity: A Guide to PKI Operations - Paperbackby Jeff Stapleton (Author), W. Clay Epstein (Author) Public Key Infrastructure (PKI) is an operational ecosystem that employs key management, cryptography, information technology (IT), information security (cybersecurity), policy and practices, legal matters (law, regulatory, contractual, privacy), and business rules (processes and procedures). A properly managed PKI requires all of these disparate disciplines to function together coherently,