Your iPhone is always at some risk from hacking and malware, no matter how small. But something that seems to have been overlooked until now is how that risk is still present even with the power off.

Researchers at the Technical University of Darmstadt in Germany (via Ars Technica) have claimed to be the first to investigate the security risks of low-power mode chips. The video below gives a brief outline of exactly what this means.

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