| http://www.w3.org/ns/prov#value | - In the printing system of the present embodiment, three kinds of data protecting functions, ???encryption protocol 2.0,??? ???encryption protocol 1.0,??? and ???no encryption protocol??? are rendered to each of the host PCs 11 through 14, each of the storages 21 through 23, and each of the printers 31 through 34.
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