How a Viking King Ended Up in Your Earbuds

How a Viking King Ended Up in Your Earbuds Bluetooth: From Runic Initials to 1600 Hops Per Second Reading time: ~15 minutes You paired your headphones this morning. Your phone found them, you tapped "connect," and music started playing. That felt like nothing happened. But between that tap and the first beat of audio, your phone and your headphones agreed on an encryption key, negotiated a codec, established a frequency-hopping pattern across 79 radio channels, and started jumping between those channels 1,600 times per second -- all in a band shared with your WiFi router, your microwave, and every other wireless device in the building. The protocol that makes this work is named after a Viking king who's been dead for a thousand years. That's not a joke. It's one of the best naming stories in the history of technology. Harald Bluetooth Gormsson In the mid-900s AD, Denmark was a mess. Warring tribes, fractured loyalties, no unified rule. Into this stepped Harald Gormsson, who became King