プレゼンテーション・グラフ プレゼンテーション・グラフ An example verifiable presentation presented schematically. There are two major components: A verifiable presentation, and its proof. The presentation consists of some metadata (here, terms of use), and a verifiable credential with its proof. The credential also has metadata, including a date of issue and an issuer, and a claim, in this case that "Pat" is an alumnus of "Example University" (which is also the issuer of the credential). The proof of the credential and the proof of the presentation have similar structure: A signature with a nonce, date, algorithm used, and a public key for the proof's creator. Presentation ABC type VerifiablePresentation termsOfUse Do Not Archive verifiableCredential A credential and its proof 資格証明グラフ 資格証明グラフ Credential 123 issuanceDate 2010-01-01T19:37.24Z type AlumniCredential credentialSubject Claim Pat AlumniOf Example University issuer Example University proof 資格証明証明グラフ 資格証明証明グラフ Signature 456 type RsaSignature2018 created 2017-06-18T21:19:10Z nonce 34dj239dsj328 signatureValue BavE110...3JT24= creator Example University Public Key 7 プレゼンテーション証明グラフ プレゼンテーション証明グラフ proof Signature 8910 type RsaSignature2018 created 2018-01-15T12:43:56Z nonce d28348djsj3239 signatureValue p2KaZ...8Fj3K= creator Example Presenter Public Key 11