Amateur radio direction finding is hide-and-seek played over the air: one device transmits from a hiding place; everyone else carries a receiver that reports how strong the signal is, but not which way. Radio amateurs call it a fox hunt. I have built a version for two BBC micro:bits – the hidden board is the Treasure…
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The Global Positioning System (GPS) relies on its primary L1 frequency to broadcast precise timing and orbital data, allowing receivers on Earth to calculate their exact location. Because the L1 C/A signal transmits at just fifty bits per second, every bit of this navigation data must earn its place. Yet, within this…
The MIKEY-SAKKE protocol is being promoted by the UK government as a better way to secure phone calls. The reality is that MIKEY-SAKKE is designed to offer minimal security while allowing undetectable mass surveillance, through the introduction a backdoor based around mandatory key-escrow. This weakness has…