n March 2010, a federal judge in Michigan ruled that Thomas Kirschner, facing charges of receiving child pornography, would not have to give up his password. That’s “protecting his invocation of his Fifth Amendment privilege against compelled self-incrimination,” the court ruled (PDF).
A year earlier, a Vermont federal judge concluded that Sebastien Boucher, who a border guard claims had child porn on his Alienware laptop, did not have a Fifth Amendment right to keep the files encrypted. Boucher eventually complied and was convicted.