Patent ID: 8510789
Filing Date: 2013-08-13
Classification: G06F,H04L

Abstract:
1. A system comprising: an output device for outputting data onto a removable storage medium; a first computing entity for encrypting a first data set, the first computing entity encrypting the first data set based on encryption parameters that comprise: public data of a trusted party, and an encryption key string comprising a second data set that defines a policy for allowing the output of the first data set onto a said removable storage medium, the first computing entity being further arranged to output the encrypted first data set for the output device; and a second computing entity associated with the trusted party and arranged when satisfied that said policy has been met, to output for the output device a decryption key, distinct from the encryption key string, for use in decrypting the encrypted first data set, the second computing entity being arranged to generate this decryption key in dependence on the encryption key string and private data related to said public data; the output device being arranged to use the decryption key in decrypting the encrypted first data set.