Analysis of LG smart TVs shows its ad software tracks nearby devices, security flaws can allow hackers to eavesdrop via a built-in microphone, and more (Gamers Nexus on YouTube)

Delivery Map Presence at Scale: A 4-State Room Lifecycle for Trusted Event Flow

Short answer: use a room lifecycle with explicit token scope, presence state, and recovery rules; pick the realtime API that makes those boundaries visible instead of hiding them in a client SDK.

• Four-state lifecycle: authenticated, subscribed, publishing, recoverable
• Server determines workspace access, client only renders presence and sends intent
• Three streams maintained: authentication, subscription state, business events

2h ago ·dev.to

How to Master Intermediate SQL in Under 10 Minutes

Most people plateau at the same point in SQL. They can write a SELECT , join two tables, and filter with WHERE . Then they hit a wall the moment a query needs to answer something slightly harder — a…

2h ago ·dev.to

How Scale Should Change the Way You Think in Tech

Most engineers learn technology by asking: “How do I make this work?” That is the right question—at the beginning. But as systems grow, it becomes the wrong question.

• Shift focus from "how to make it work" to "what happens when it works for everyone"
• At scale, engineers must think about system interactions, not just features
• At large scale, failures become the norm and require proactive preparation

2h ago ·dev.to

I’ve factored the RSA keys of a Certificate Authority…from the 90s

2h ago ·mcpherrin.ca