What a bastion host (or jump host) is: the single controlled entry point into a private network, why it shrinks the attack surface, and where it fits in an SSH architecture.
What a VPN is in plain terms, what it's for, and why WireGuard has become popular: simplicity, performance, and modern cryptography compared to older solutions.
Cloudflare proposes Web Bot Auth: legitimate bots and AI agents sign their HTTP requests with a cryptographic signature (RFC 9421), instead of being recognised by spoofable IPs or User-Agents.
What a brute force attack is, why every exposed service gets them, and the basic defenses: strong passwords and keys, multi-factor authentication, rate limiting, and tools like fail2ban.
A reverse proxy explained in plain terms: an intermediary in front of your applications for TLS, caching, load balancing and security. The difference from a forward proxy, and why it's a common…
NIST has selected HQC as a backup post-quantum algorithm for encryption, built on different math than ML-KEM. What it is, the problem it addresses, and why having an alternative matters.