Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2 Public Key Infrastructure A public key infrastructure, often shortened to PKI, is a system of digital certificates, certification authorities (CAs) and other registration authorities (RAs) that verify and authenticate the validity of each party involved in an electronic transaction t
![Public Key Infrastructure: Public Key](https://cdn-ak-scissors.b.st-hatena.com/image/square/d6e4cb632c7025e9f5e05fd314fbf6dcd6144e8d/height=288;version=1;width=512/https%3A%2F%2Flearn.microsoft.com%2Fen-us%2Fmedia%2Fopen-graph-image.png)