// ARTICLES — ALL WRITE-UPS
Hold your breath — we’re doing a deep dive.
Let’s take a look behind the curtain. Understand it, calculate it, code it.
2026-08-17 5 MIN Dave Is No Billionaire CEO — SMTP A postman who delivers every letter without ever checking who really wrote it. That's SMTP. And that's exactly why 'From: your CEO' means almost nothing on its own. NETWORK 2026-08-02 4 MIN Excuse me, what time is it? — NTP A passenger's expired ticket looks perfectly valid — on his phone. Who gets to decide what 'now' really is? That's NTP: the time everyone in a network agrees on, handed down from an atomic clock. NETWORK 2026-07-26 3 MIN DORA knows where you sleep — DHCP You don't just grab a random hotel room — you talk to Alice at the front desk. DHCP works the same way: Discover, Offer, Request, Acknowledge, and you've got an IP with a checkout date. NETWORK 2026-07-19 4 MIN Who the hell is Alice? — ARP A lost key at a party, one shout into the room, and one raised hand — ARP is the protocol that trusts everybody. That trust is exactly the problem. NETWORK 2026-07-07 3 MIN TLS – Director of Secure Communication TLS doesn't encrypt anything itself — it's the boss deciding which armored vehicle your gold rides in. The handshake, step by step. NETWORK 2026-07-07 13 MIN What is ElGamal? A whistleblower, three numbers in a newspaper, and a furious mayor — the discrete logarithm, the math, and a proof in Python. CRYPTO 2026-07-03 12 MIN What is RSA? Public-key crypto told through Bob, Alice, and a nosy Dave in the middle — the story, the math, and a proof in Python. CRYPTO