Patent ID: 8819409

Claim:
A distribution system for distributing digital information comprising a server and a computing device, the server and computing device each comprising a communication module for communication between the server and the computing device, the server comprising an encryption module for encrypting the digital information with a cryptographic encryption key, the computing device comprising a decryption module for decrypting the encrypted digital information with a cryptographic decryption key corresponding to the encryption key, the system comprises a cryptographic key module for obtaining the encryption and decryption key, wherein the computing device comprises an integrated physically unclonable function, the computing device being configured for obtaining a first response from the physically unclonable function before a security breach has occurred that revealed data and/or programming code of the computing device, and for sending the server an enrollment message comprising the first response, the server comprises the cryptographic key module and an enrollment module for determining helper data from the decryption key and the first response obtained from the physically unclonable function to enable later reconstruction, after the security breach has occurred, of the decryption key from the helper data and a second response obtained from the physically unclonable function, the computing device comprises a reconstruction module for reconstructing the decryption key from the second response and the helper data, and the server is configured for encrypting the digital information with the cryptographic encryption key and for sending the helper data to the computing device after the security breach has occurred.