Encrypted Handshakes: The RSA Public Key Exchange
Wild question: how can RSA let you send a secret through a network everyone can watch? It hands out an open lock. Your browser sna…
◆ Subject
Technology
8 sourced explainers about technology from Signal by Avaryn.
The Hidden Mechanism Behind Lithium-Ion Cells
Crazy part: a lithium-ion battery does not fill with electricity. When you plug in, charging starts by rearranging particles, forc…
The Hidden Mechanism Behind Semiconductor Fab
Here is the weird part: a semiconductor fab is not really making a chip. It is preventing failure. One wafer must hold billions of…
How Data Travels Through the Internet
Nothing you send online ever arrives intact. Every photo, video, or message is instantly shattered into thousands of tiny, numbere…
How a Touchscreen Detects Your Finger
Your phone screen has no button underneath it. Beneath the glass sits an invisible grid of ultra-thin conductive channels, each on…
GPS in Motion: How Satellites Turn Time Into Your Exact Position
GPS finds your position by measuring time, not by scanning a map. Each satellite broadcasts two essentials: the exact instant its …
Why Lithium-Ion Batteries Age: The Chemistry Behind Capacity Loss
Every lithium-ion battery starts dying the moment it's made. The chemistry that stores energy also slowly destroys the cell — and …
Why Phone Batteries Age: Heat, Voltage, and Cycle Wear
Phone batteries age because charging is never perfectly reversible. In a healthy cell, lithium ions shuttle cleanly between two el…