What I’m imagining is essentially a supply chain attack: The victim (mistakenly) trusts the attacker to supply an encoder. The encoder appears to function norma

What I’m imagining is essentially a supply chain attack: The victim (mistakenly) trusts the attacker to supply an encoder. The encoder appears to function normally, but in fact will subtly leak information smuggled in decoded values of the victim’s data. Far-fetched, indeed.