About: http://webisa.webdatacommons.org/149255368

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	In the prior art, also challenge response protocols are known for enabling a server to authenticate a client or user, i.e. to verify that the user possesses his private key, before showing the user any private information.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com