Patent ID: 8407782

Claim:
A method performed by a first computing device, the method comprising: receiving an encrypted version of a first set of protected digital data; receiving a first crypt key specifically associated with the first set of protected digital data; decrypting the encrypted version of the first set of protected digital data using the first crypt key to produce decrypted digital data; managing forms of usage of the first set of protected digital data, wherein said managing includes, for a first form of usage requested by a user of the first computing device: when the first form of usage is one of a first set of usages, permitting the first form of usage using the decrypted digital data; and when the first form of usage is one of a second set of usages distinct from usages in the first set, permitting the first form of usage on a re-encrypted version of the decrypted digital data generated by re-encrypting the decrypted digital data using a second crypt key.