Abstract: A portable storage device includes a meclhanismn for receiving a value of an identification parameter from a receiving device, a non-volatile memory for storing digital content, a licensing policy, and a license for viewing the digital content on the receiving device as identified by the identification parameter, and a controller that is operative, in response to the identification parameter and the license, to provide a controlled feeding of at least a portion of the digital content to the receiving device, in accordance with the licensing policy.

Abstract: A data storage device includes one or more non-volatile, blockwise erasable data storage media and a mechanism for sanitizing the media in response to a single external stimulus or in response to a predetermined physical or logical condition. Optionally, only part of the media is sanitized, at a granularity finer than the blocks of the medium. Setting a flag in an auxiliary nonvolatile memory enables an interrupted sanitize to be detected and restarted. Optionally, a “death certificate” verifying the sanitizing is issued. Preferably, the media are configured in a manner that allows atomic operations of the sanitizing to be effected in parallel.