Patent ID: 8001616
Filing Date: 2011-08-16
Classification: G06F

Abstract:
1. A method to deter unauthorized access, comprising: encrypting each copy of a data structure to be embodied on an electronically-readable medium; assigning a different key to decrypt the each copy of the data structure, wherein the data structure is decryptable only in response to the key assigned to the copy; and electronically identifying each copy of the data structure with an authorized user; and electronically marking each copy of the data structure to identify the authorized user by using one of a public key signature, steganography or watermarking to identify the authorized user; wherein the encrypted copy of a data structure comprises data to format information content data into a plurality of different predetermined formats, each predetermined format corresponding to a different version of the information content for a different recipient, and wherein the encrypted copy of data structure is decrypted to provide each of the different predetermined formats by a different key to present the corresponding different version of the information content.