About: http://webisa.webdatacommons.org/16918435

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	And if as you suggest the keys are stored in the machine along with the encrypted data then, well ya, the intruder could read the files.
http://www.w3.org/ns/prov#wasQuotedFrom	ittoolbox.com