Another decryption case; 11th Circuit
Different facts, different ruling. Here, .gov didn't know what, if anything was on the drive, and the 11th held that providing passwords was testimonial and protected by the 5th Amendment.
With analysis here: http://volokh.com/2012/02/23/elevent...pted-computer/
"To spit on your hands and lower the pike; to stand fast over the body of Leonidas the King; to be rear guard at Kunu-Ri; to stand and be still to the Birkenhead Drill; these are not rational acts. They are often merely necessary." Pournelle