Public Key Infrastructure (PKI) is a comprehensive system that provides public-key encryption and digital signature services:
- Authentication - Uniquely identifies the information originator and consumer
- Confidentiality or Privacy - Assures information and data are protected from unauthorized access
- Data integrity - Assures data has not been accidentally or deliberately altered
- Non-Repudiation - Provides proof of the integrity and origin of data, verifiable by a third party. Non-repudiation services may provide important legal evidence in the event of a dispute.