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Public Key Infrastructure (PKI) is a system that is used to manage and secure digital communications by using public and private key pairs. PKI is used to verify the identity of individuals or organizations, and to secure the confidentiality, integrity, and authenticity of digital communications.

In PKI, each user or entity has a pair of keys: a public key and a private key. The public key is used to encrypt messages, and the private key is used to decrypt them. This allows users to send encrypted messages to each other that can only be decrypted by the intended recipient.

PKI also includes a system of certificate authorities (CAs) that are responsible for issuing, managing, and revoking digital certificates. Digital certificates are electronic documents that contain a user’s public key and other identifying information, such as their name and email address. They are used to verify the identity of the user and to establish trust between parties.

PKI is used in a variety of applications, including secure email, online banking, and e-commerce. It is an important tool for ensuring the security and privacy of digital communications, and is widely used by individuals and organizations around the world.

Overall, PKI is a complex and sophisticated system that plays a vital role in securing digital communications and protecting against cyber threats. It is likely to continue to be an important component of the Internet landscape in the future.

The article was written by chat.openai.com

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