Reproducing hash values from printed documents to validate with a blockchain

A system and method are disclosed for rendering printed documents tamper evident. Examples render classes of documents tamper evident with cryptographic level security or detect tampering events, where such security was previously unavailable, for example, in documents printed using common printers...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	Wilson, Kelce S
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING CHECKING-DEVICES COMPUTING COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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