PKI (Public Key Infrastructure) is...

PKI (Public Key Infrastructure) is...

• A. Governing encryption keys through the issuance and management of digital certificates
• B. Managing user passwords
• C. Providing network routing services
• D. Issuing software licenses

Answer: (A)

Public Key Infrastructure is the framework for issuing and managing digital certificates that bind public keys to the identities of entities. The core idea is that encryption relies on a key pair: a public key that can be shared to encrypt data or verify a signature, and a private key that remains secret to decrypt or create a signature. Digital certificates are the trusted wrappers that connect a public key to a real-world identity, so others can trust that the key really belongs to the claimed owner. These certificates are issued by trusted authorities, often with a hierarchy that includes subordinate authorities, to establish a chain of trust. PKI also covers the lifecycle of certificates—how they’re issued, renewed, and revoked when a key is compromised or an entity is no longer trusted—along with mechanisms to check certificate validity (like revocation lists or status protocols). Because of this focus on key management and trusted binding of keys to identities, PKI is best described as governing encryption keys through the issuance and management of digital certificates. Activities such as password management, routing services, or software licensing operate in different domains and don’t encapsulate the main function of PKI.

Public Key Infrastructure is the framework for issuing and managing digital certificates that bind public keys to the identities of entities. The core idea is that encryption relies on a key pair: a public key that can be shared to encrypt data or verify a signature, and a private key that remains secret to decrypt or create a signature. Digital certificates are the trusted wrappers that connect a public key to a real-world identity, so others can trust that the key really belongs to the claimed owner. These certificates are issued by trusted authorities, often with a hierarchy that includes subordinate authorities, to establish a chain of trust. PKI also covers the lifecycle of certificates—how they’re issued, renewed, and revoked when a key is compromised or an entity is no longer trusted—along with mechanisms to check certificate validity (like revocation lists or status protocols). Because of this focus on key management and trusted binding of keys to identities, PKI is best described as governing encryption keys through the issuance and management of digital certificates. Activities such as password management, routing services, or software licensing operate in different domains and don’t encapsulate the main function of PKI.