| http://www.w3.org/ns/prov#value | - As a technique for verifying validity of such a kind of electronic document data, for example, various kinds of techniques such as a technique disclosed in Japanese literature Cryptography and Information Security, edited by Shigeo Tsujii and Masao Kasahara, published by Shokodo, pages 127 to 147 and the like have conventionally been proposed.
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