One bit is enough: hidden data encoded via AC polarity flips across systems

MoonL88537 · x · 2026-09-05

A covert-channel/data-encoding showcase: flip AC current polarity and use the flips as bit markers — rectify it and you get both power and data. The referenced example shows rich data can be entangled as bits across disparate systems via URLs, even down to a single bit, prompting the author's warning that 'we can't see everything'.

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