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security/digital-signatures-how-a-message-proves-who-wrote-it-and-that-nobody-c.md
Digital signatures: how a message proves who wrote it and that nobody changed it
How can you tell that a message really came from who it says, and that nobody changed a word on the way? A digital signature does both with…
ai/the-context-window-why-a-chatbot-forgets-the-start-of-a-long-chat.md
The context window: why a chatbot forgets the start of a long chat
A chatbot does not remember your conversation. Each time you press send, the app hands the model the whole chat again, and the model can…
mobile/deep-links-why-one-link-opens-an-app-and-another-opens-a-web-page.md
Deep links: why one link opens an app and another opens a web page
Tap the same link on two phones and one opens an app while the other opens a web page. Who decides, and how? This article explains deep…
web/http-requests-and-responses-what-a-404-and-a-301-really-say.md
HTTP requests and responses: what a 404 and a 301 really say
Every web page starts as two short pieces of plain text: a request from your browser and a response from a server. Learn to read them and…