Radio antennae are the original networking technology, and researchers presenting in Berlin Thursday showed how useful they are as hacking tools.

The hardware researchers set out to find different kinds of vulnerabilities in the most popular hardware wallets used by cryptocurrency holders, from Trezor and Leger. At the Chaos Computer Club Conference in Germany, Dmitry Nedospasov said that he and his collaborators set out to find three different kinds of vulnerabilities and said they succeeded in finding all three.

They presented vulnerabilities the supply chain (where the attacker gets access to the device before the consumer owns it), side channel attacks (where observations are made on the hardware itself rather than the code running the hardware) and glitch attacks (where attackers attempt to disrupt data transmission within a device).

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