Public-key infrastructure
Public-key infrastructure is a framework of authorities, certificates, keys, policies, and procedures for establishing and managing public-key trust and digital identities.
Acing the Certified Kubernetes Administrator Exam, Second Edition
Public key infrastructure is a security framework that uses public-key cryptography and trusted certificates to authenticate parties and protect communications.
- How it is used
- Secures Kubernetes API access and communication among control-plane and node components through certificate-based identity checks.
- How deep it goes
- Explains the CA trust model and certificate locations, then stops short of certificate creation or management procedures.
- Examples
- Uses kubectl authentication, kubelet.conf, /etc/kubernetes, and /etc/kubernetes/pki as concrete inspection examples.
- What you can do after
- Evaluate Kubernetes certificate-based authentication and locate component certificates during cluster inspection or CKA troubleshooting.
Real-World Cryptography
The web public key infrastructure is the ecosystem of browser-trusted authorities, certificates, and procedures that authenticates public keys for web connections.
- How it is used
- Authenticates public keys for browser connections and organizational email through trusted authorities.
- How deep it goes
- Explains transitive trust, signed key mappings, browser trust anchors, and domain validation, but stays high-level.
- Examples
- Uses browser-trusted authorities, signed website keys, domain ownership checks, and S/MIME-managed employee email identities.
- What you can do after
- Evaluate how browsers authenticate website keys and how organizational email systems bootstrap identity trust.
Read how Real-World Cryptography explains public-key infrastructure →
Related concepts
- certificateuses · A digital certificate is a digitally signed credential that binds an identity to a public key and supports authentication or secure communication.
- certification authorityuses · A certification authority is a trusted entity that verifies identities and issues digitally signed certificates binding public keys to identities or domains.
- S/MIMEused by · S/MIME is a public-key cryptographic standard for digitally signing and encrypting email using certificates.
- browserused by · A web browser is software that retrieves, interprets, and renders web resources, executes supported web content, and enables interaction with web pages and applications.
- digital signatureuses · A digital signature is cryptographic data generated with a private key and verified with corresponding public information to authenticate data or its signer and detect alteration.
- Kubernetesused by · Kubernetes is an open-source platform for orchestrating and automating the deployment, scaling, and management of containerized workloads across computing clusters.
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