Millions if not billions of people use Bluetooth technology every day but very few know that its logo has an ancient hidden meaning.

Even the iconic Bluetooth logo pays homage to King Harald, blending two runes from the Younger Futhark alphabet: ᚼ (H) and ᛒ (B)—Harald Bluetooth's initials.

The Bluetooth vulnerability combination nicknamed "PerfektBlue" is currently making waves. It affects vehicles from Mercedes, Skoda & VW.

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