Ayush Kumar Rai

CLM

ACME automates TLS certificate issuance and renewal without human intervention. Here's how to set it up with Certbot, acme.sh, and cert-manager — with real configs for Nginx, Apache, and Kubernetes.

Cryptography

Cryptographic key management is where encryption succeeds or fails. Here's how to manage keys across cloud, on-premises, and hybrid environments — with practical patterns for generation, storage, rotation, and destruction.

Code signing

Code signing proves software authenticity and integrity. Here's how to implement it across CI/CD pipelines, protect signing keys, and defend against supply chain attacks like SolarWinds and xz-utils.

Cloud

All three cloud providers offer key management services, but they differ in architecture, pricing, compliance levels, and integration depth. Here's a practical comparison to help you choose.

Post quantum

Analyze current Q-Day timeline estimates from NIST, NSA, and industry researchers. Understand what the predictions mean for your encryption migration planning.

Post quantum

Understand the harvest-now-decrypt-later threat model, how adversaries exploit it today, and what immediate actions protect your long-lived encrypted data from future quantum decryption.

Pki

Certificate Transparency creates a public audit trail of every TLS certificate issued. Here's how CT logs work, how to monitor them for unauthorized certificates, and why they replaced certificate pinning.

Post quantum

A step-by-step guide to building crypto-agility into your enterprise. Learn how to integrate CLM, plan hybrid deployments, and prepare infrastructure for post-quantum algorithms.

Pki

Three protocols for enrolling devices and systems with certificates. Here's when to use SCEP (legacy), EST (modern), or CMP (full-lifecycle) — with practical guidance for MDM, IoT, and enterprise PKI.

Ssh

A complete guide to SSH, its meaning, commands, protocol, and how it works

Ssh

Why SFTP is the preferred method for secure file transfers in modern enterprises

Devops

Three approaches to automated certificate management: Kubernetes-native (cert-manager), cloud-managed (ACM), and provider-managed (Cloudflare, GCP). Here's when each makes sense and how they compare.

Ssh

Unmanaged SSH keys are permanent backdoors with no expiry, no MFA, and no audit trail. Here's why SSH key protection is critical, what attacks exploit weak key management, and how to secure your SSH infrastructure.

Ssh

Learn about different SSH authentication methods, their security implications, and best practices for secure SSH access.

Pki

TLS certificates enable HTTPS, prove server identity, and encrypt data in transit. Here's how they work, the types available, how to get one, and how to manage them at enterprise scale.

Pki

From full CA platforms (EJBCA, Smallstep) to certificate automation (cert-manager, Certbot) to SSH CAs (Vault, SPIRE). Here's every open-source PKI tool worth considering, with honest comparisons.