Patent ID: 7802102

Claim:
A computer-implemented system for transferring protected data between data processing systems of a computer data network, comprising: a first data processing system of a computer data network operable to retrieve encrypted data stored thereat, the encrypted data being encrypted at the first data processing system by cryptographic operations according to a first set of protection attributes, the first data processing system being operable to attach the first set of protection attributes to the retrieved encrypted data and transfer the encrypted data with the attached first set of protection attributes from the first data processing system to a second data processing system of the computer data network, the second data processing system being operable to receive the encrypted data with the attached first set of protection attributes from the first data processing system and to encrypt the received first set of protection attributes by cryptographic operations according to a second set of protection attributes different from the first set of protection attributes, the second data processing system being operable to store the encrypted first set of protection attributes and the received encrypted data in the encrypted form received from the first data processing system without decrypting the received encrypted data and without encrypting the received encrypted data according to the second set of protection attributes.