Physical digital media delivery

A method comprising:

• sending a list of desired content desired to a content provider having access to a second public encryption key corresponding as a public-private key pair to a first private encryption key stored in a secure memory device in a player;
• receiving in the player from a portable medium in communication with the player, an encrypted first content key and an encrypted digital content file comprising the desired content desired and an encrypted content key, the encrypted digital content file encrypted with the first content key for use with the player and the first content key encrypted with the second public encryption key;
• copying the encrypted first content key and the encrypted digital content file from the portable medium to a local storage device in the player;
• and
• playing the encrypted digital content file copied to the local storage device using the first private encryption key;
• and
• in response to detection of a compromise of security:
• receiving a re-encrypted digital content file, wherein the re-encrypted digital content file is created by re-encrypting the digital content file with a second content key, and wherein the encrypted digital content file in the local storage device in the player is replaced with the re-encrypted digital content file;
• and
• receiving an encrypted second content key, wherein the encrypted second content key is encrypted using the public encryption key, and wherein the encrypted first content key in the local storage device in the player is replaced with the encrypted second content key.

A portable cartridge, comprising:

• a connector configured to couple to a player having a corresponding first private encryption key associated therewith;
• and
• a storage device coupled to the connector, wherein the storage device is configured to store digital content including a digital content file and a content key, one or more parts of which have wherein the content key has been encrypted by a second public encryption key,
• wherein the second public encryption key is associated with the first private encryption key as a respective public-private key pair, such that the digital content key is configured to be reproduced by the player,
• wherein the digital content further includes a list of available digital content files and the digital content includes information for communication with a processor, a clock, and a timer, wherein the processor, the clock, and the timer reside in the player, and
• wherein the processor, clock and timer are portable cartridge is configured to communicate with the portable cartridge processor, the clock, and the timer to reproduce digital content onto a local storage medium in the player.

A method comprising:

• storing a private encryption key in a first computing device, the private encryption key corresponding as a public-private key pair to a public encryption key;
• encrypting, using a first content key, a digital content file;
• encrypting, using the public encryption key, the first content key for use with the first computing device;
• storing the encrypted digital content file and the encrypted first content key on a first portable medium, the first portable medium configured to be used with the first computing device;
• and
• in response to detecting a compromise in security:
• re-encrypting the digital content file with a second content key;
• encrypting, using the public encryption key, the second content key;
• storing the re-encrypted digital file and the encrypted second content key on a second portable medium;
• and
• transmitting the second portable medium to the first computing device.

A method comprising:

• storing a private encryption key in a media device, the private encryption key corresponding as a public-private key pair to a public encryption key;
• receiving by the media device, from a first portable medium in communication with the media device, encrypted media content and an encrypted first content key, the encrypted first content key comprising a first content key having been encrypted using the public encryption key, and the encrypted media content having been encrypted using the first content key;
• accessing, by the media device, the encrypted media content using the private encryption key and the first content key;
• and
• in response to detection of a compromise of security:
• receiving, by the media device from a second portable medium in communication with the media device, re-encrypted media content, the re-encrypted media content having been created by re-encrypting the media content with a second content key;
• and
• receiving, by the media device from the second portable medium, an encrypted second content key, the encrypted second content key having been encrypted using the public encrypted key.

A media device configured to receive encrypted media content, the media device comprising:

• a storage device configured to store a private encryption key, the private encryption key corresponding as a public-private key pair to a public encryption key;
• and
• at least one processor configured to:
• receive, from a first portable medium in communication with the media device, encrypted media content and an encrypted first content key, the encrypted first content key comprising a first content key having been encrypted using the public encryption key, and the encrypted media content having been encrypted using the first content key;
• access the encrypted media content using the private encryption key and the first content key;
• and
• in response to detection of a compromise of security:
• receive, from a second portable medium in communication with the media device, re-encrypted media content, the re-encrypted media content having been created by re-encrypting the media content with a second content key;
• and
• receive, from the second portable medium, an encrypted second content key, the encrypted second content key having been encrypted using the public encryption key.