Did you know? You can evaluate a logic circuit without knowing whether its internal wires carry 0 or 1. Yao's garbled circuits replace those bits with cryptographic labels: the labels you hold unlock the next gate's output label, not its meaning. Two parties can compute a result from private inputs without handing those inputs to a trusted middleman. The basic version assumes both follow the protocol; catching a cheating participant needs extra machinery. #privacy #cypherpunk