International Business Machines Corporation
Controlling access to encrypted data

Abstract:

Enabling access to encrypted information by providing a master key and a public key to a partial content owner, generating a ciphertext of content according to a complete content data, at least one content data partition and the public key, wherein the content data partition comprises a portion of the complete content data, providing the ciphertext of the content data and the public key to a validator, receiving a validation result from the validator, and acting upon the validation result.