Shivam Sharma

Understand ML-KEM (formerly CRYSTALS-Kyber), NIST's FIPS 203 post-quantum key encapsulation mechanism. Covers how lattice-based cryptography works, parameter sets, performance benchmarks, hybrid TLS deployment, and migration timeline.

Compare PKI management tools — EJBCA, Smallstep, Vault PKI, cert-manager, AD CS, and enterprise CLM platforms. Covers features, scalability, compliance, cost, and selection criteria for every organization size.

Implement keyless container image signing with Sigstore Cosign and GitHub Actions OIDC. Covers setup, verification, policy enforcement, SLSA provenance, and production deployment patterns.

Understand every field in an X.509 certificate — serial number, subject, issuer, SAN, key usage, thumbprint, and extensions. Includes OpenSSL decoding examples and real-world troubleshooting for each field.

Master OpenSSL with this comprehensive guide covering certificate generation, CSR creation, chain verification, TLS debugging, format conversion, and production hardening. Every command you'll ever need.

A detailed, honest comparison of QCecuring SSL Certificate Lifecycle Management vs Venafi TLS Protect (now CyberArk Machine Identity Security) for enterprise certificate lifecycle management. Features, pricing, deployment, architecture, and who each platform is best for.

X.509 defines the format for digital certificates used in TLS, code signing, email encryption, and PKI. Here's what's inside an X.509 certificate, how extensions work, and where format issues cause failures.

Key exchange lets two parties derive a shared secret over an insecure channel without transmitting the secret itself. Here's how DH and ECDHE work, why ephemeral keys provide forward secrecy, and where key exchange fails.

Expired certificates cause more outages than cyberattacks. Here's the real cost of certificate outages, why they keep happening, and the engineering practices that eliminate them.

ECC provides equivalent security to RSA with dramatically smaller keys and faster operations. Here's how elliptic curves work, which curves to use, and why ECC dominates modern TLS deployments.