FIELD: information technology.
SUBSTANCE: recipient receives content from a publisher. Some content is managed by an access server. The access server controls the recipient's use of managed content through interaction with a trusted agent at the recipient. The content is encrypted on a content key, and the content is associated with policy information. The policy information includes the content key for decrypting the content. The policy information is encrypted on an access server key allowing the policy information to be decrypted by the access server. The content key is received from the access server. The content key is encrypted on a trusted agent key. The content key is further encrypted on additional factor(s) defining additional content protection beyond that provided by trusted agent. The content key is decrypted using the trusted agent key and the at least one additional factor. The content is decrypted using the content key.
EFFECT: high reliability of content protection.
20 cl, 4 dwg
