Tag: #security
Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 141 posts
Python PyPI Supply Chain Attack Defense Strategy: From Typosquatting to Multi-layered Security
Analyzes the types of Python PyPI supply chain attacks that surged in 2025-2026, presenting multi-layered defense strategies against typosquatting, dependency confusion, and malicious build scripts with practical code ex
2026-03-14 · 16 min read #python#pypi#supply-chain#devops#securityAI Coding Agent Sandboxing: Secure Code Execution Isolation and Security Operations Guide
As AI coding agent autonomy increases in 2026, security isolation has become essential. Covers practical sandboxing technologies including macOS sandbox-exec, container-based isolation, MicroVM, and operations guides.
2026-03-14 · 23 min read #ai-agent#sandboxing#security#ai-platform#devopsKubernetes Network Policy with Calico and Cilium Microsegmentation
A comprehensive guide to Kubernetes network security using Network Policies with Calico and Cilium for microsegmentation.
2026-03-12 · 21 min read #kubernetes#network-policy#calico#cilium#securityThe Complete Guide to Kubernetes Network Policy: Zero Trust Network Security with Cilium and Calico
A comprehensive deep dive from Kubernetes NetworkPolicy fundamentals through Cilium CiliumNetworkPolicy (L3-L7 filtering, DNS-based policies, eBPF) and Calico GlobalNetworkPolicy. Covers Default Deny strategy, namespace
2026-03-11 · 15 min read #kubernetes#network-policy#cilium#calico#zero-trustKubernetes RBAC Deep Dive: Implementing Least-Privilege Access Control with Role, ClusterRole, and OPA Gatekeeper
A comprehensive production guide covering Kubernetes RBAC core concepts (Role, ClusterRole, RoleBinding, ServiceAccount) through policy-based access control with OPA Gatekeeper. Includes least-privilege principle impleme
2026-03-10 · 13 min read #kubernetes#rbac#opa-gatekeeper#security#access-controlLLM Safety and Red Teaming Practical Guide: From Adversarial Defense to Guardrail Implementation
A practical guide to LLM safety covering red teaming methodology, adversarial attack defense, and guardrail implementation.
2026-03-08 · 42 min read #llm#red-teaming#safety#guardrails#prompt-injectionSSL/TLS Certificate Complete Guide: From Issuance to Auto-Renewal and Troubleshooting
A comprehensive practical guide covering SSL/TLS certificate fundamentals, Let's Encrypt automated issuance, Nginx/AWS environment configuration, certificate auto-renewal, and common error resolution.
2026-03-08 · 13 min read #devops#ssl#tls#certificate#securitySSO Cookie/JWT Authentication System Complete Guide — Framework-Specific Practical Series Index
An overview of the complete flow of SSO, cookie, and JWT-based authentication systems, with a guide to the practical implementation series for Spring Boot, Django, React, and Next.js frameworks.
2026-03-08 · 15 min read #architecture#authentication#sso#jwt#cookieSSO Integration Practical Guide - OIDC/OAuth2 + Cookie/JWT Hybrid Architecture, Token Rotation Complete Mastery
Complete mastery of designing and implementing SSO with OIDC/OAuth2 and cookie/JWT hybrid architecture, covering token rotation, refresh strategies, and multi-service authentication with practical code.
2026-03-08 · 20 min read #architecture#authentication#sso#oidc#oauth2Concurrent Login Prevention Implementation Guide — Layer-by-Layer Strategies with IP, Session, JWT, and Nginx Including Practical Code
A comprehensive guide covering concurrent (duplicate) login control through IP-based, session-based, JWT-based, and Nginx-level approaches — with architecture, pros/cons, practical code, and operational checklists all in
2026-03-08 · 13 min read #architecture#security#authentication#session#nginxLinux Kernel Parameter Tuning Guide: sysctl + Boot Params, Safe Changes and Rollback
This guide covers Linux kernel tuning strategies using sysctl runtime parameters and boot parameters. It provides recommended values for networking, memory, filesystem, and security categories, along with pre-change back
2026-03-07 · 11 min read #linux#kernel#sysctl#performance#tuningSecurity vulnerability action playbook: OS package, container image, runtime hardening
We organize a practical security operation playbook that covers everything from CVE discovery to action, verification, and reporting, OS package vulnerability patching, container image security, and runtime hardening.
2026-03-07 · 16 min read #devops#security#vulnerability#cve#containerChatbot Tool Calling Guardrails Design: Safe Tool Invocation Architecture in Practice
Covers guardrail design for safely operating tool-calling chatbots in production. Addresses schema validation, permission control, policy engines, risk scoring, observability, and regression testing with code.
2026-03-04 · 18 min read #chatbot#tool-calling#guardrails#ai-agent#securityKubernetes Network Security with Cilium and eBPF: From L3/L4/L7 Policies to Encryption
Hands-on practice with Cilium CNI eBPF-based network policies. Going beyond the limitations of standard NetworkPolicy, we cover L7 HTTP/gRPC filtering, DNS-based policies, WireGuard encryption, and Hubble monitoring.
2026-03-03 · 9 min read #kubernetes#cilium#ebpf#network-policy#securityThe Complete Security Guide for Developers — From Encryption to Zero Trust
Symmetric and asymmetric encryption, hashing, TLS handshake, OWASP Top 10, SQL Injection, XSS, CSRF, and Zero Trust architecture. A comprehensive summary of security concepts every developer must know, complete with code
2026-03-02 · 29 min read #architecture#security#encryption#zero-trust#owaspOAuth 2.0 Mastery — Everything About Authentication and Authorization
From the inner workings of OAuth 2.0 to Authorization Code, PKCE, Refresh Tokens, and OpenID Connect. Why does a single Google login button require such a complex protocol? We fully dissect it with code and sequence diag
2026-03-02 · 7 min read #architecture#oauth2#security#authentication#authorizationKubernetes RBAC Complete Guide: Hands-On Practice for Golden Kubestronaut Exam Prep
From core concepts to real-world scenarios of Kubernetes RBAC (Role-Based Access Control). A hands-on guide covering least privilege implementation with Role, ClusterRole, RoleBinding, and ServiceAccount, plus Golden Kub
2026-03-02 · 8 min read #kubernetes#rbac#security#kubestronaut#ckaThe Death and Resurrection of Kubernetes Networking: 5 Changes You Must Know Before March 2026
From the March 2026 EOL of Ingress NGINX, the transition to Gateway API, eliminating annotation technical debt, role-based resource separation, vendor portability, to the adoption of HTTP/3 and QUIC -- an in-depth analys
2026-03-01 · 34 min read #kubernetes#networking#gateway-api#ingress-nginx#http3The Definitive Guide to Next-Generation Digital Identity, SSO, and Keycloak in Practice
Compare SSO architectures and SAML/OAuth2/OIDC standards, then dive into Keycloak production deployment, authentication flows, RBAC/ABAC authorization, LDAP integration, Spring Boot/Next.js integration, and high availabi
2026-03-01 · 12 min read #keycloak#iam#sso#oauth2#oidcBringing Kubernetes to Your Local Machine: 5 Game-Changing Innovations from Podman
From Podman daemonless architecture, rootless security model, running K8s YAML locally with play kube, Pod-native management, to Pasta networking — an in-depth analysis from an architect perspective of 5 innovations that
2026-03-01 · 33 min read #podman#container#kubernetes#rootless#daemonless