Shivam Sharma

Zero trust eliminates network-based trust. Certificates provide the cryptographic identity that replaces it. Here's how PKI enables zero trust, what architecture patterns work, and where implementations fail.

Cloud-based PKI offloads CA infrastructure to providers like AWS, Google, and Azure. Here's what they manage, what you still own, and where managed PKI creates hidden dependencies.

Public CAs issue certificates trusted by every browser. Private CAs issue certificates trusted only within your organization. Here's when to use each, what changes architecturally, and where teams make costly mistakes.

Homomorphic encryption lets you compute on encrypted data without decrypting it. Here's how it works, what's actually practical today, and where the technology stands for enterprise use cases.

Renewal extends trust before expiry. Revocation kills trust immediately. Here's how both mechanisms work, why revocation is fundamentally broken in browsers, and what that means for your infrastructure.

Root CAs anchor trust and stay offline. Intermediate CAs handle daily issuance. Here's why the separation exists, how the chain works, and what happens when either is compromised.

Every certificate passes through six stages: request, validation, issuance, deployment, monitoring, and renewal or revocation. Here's what happens at each stage, who owns it, and where the process breaks.

Microsoft AD CS has been the enterprise PKI default for 20 years. Here's why organizations are migrating away, what modern alternatives exist, and how to execute the migration without breaking everything.

A Certificate Authority issues and signs digital certificates that establish trust on the internet. Here's what it does, how the trust model works, and where organizations get it wrong.

A practical guide to building a two-tier PKI with an offline Root CA and online Issuing CA. Includes architecture decisions, step-by-step setup, and the mistakes that will cost you at 2 AM.