From: EFF

Prosecutors Demand Laptop Password in Violation of Fifth Amendment

EFF has urged a federal court to block the government’s attempt to force a woman to enter a password into an encrypted laptop. During the investigation, the government seized the device from the home she shares with her family, and then asked the court to compel the woman to type the password into the computer or turn over a decrypted version of her data. But EFF told the court that the demand is unconstitutional, violating her Fifth Amendment privilege against self-incrimination.