| http://www.w3.org/ns/prov#value | - blish the channel key, wherein the second key is a secret key of an asymmetric key pair, wherein the system is configured to provide a first key corresponding to a public key of the asymmetric key pair to a transmitter arranged to communicate the first key in a message to the authorised receiver, wherein the scrambler is arranged to scramble at least the section of the content data object by apply
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