rubber-hose cryptoanalysis
n.— «If found by authorities, that anti-filter software can lead to coercive interrogation, a bid to uncover the suspect’s Internet travel secrets using a tactic known to insiders as “rubber-hose cryptoanalysis.”» —“Scaling the firewall of digital censorship” by Oliver Moore Globe and Mail (Toronto, Can.) Feb. 13, 2006. (source: Double-Tongued Dictionary)