Statements (24)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:Security_feature
|
| gptkbp:createdBy |
Digital overlay
Varying paper thickness |
| gptkbp:inventedBy |
13th century
|
| gptkbp:originatedIn |
gptkb:Italy
|
| gptkbp:relatedTo |
Counterfeiting
Document security |
| gptkbp:type |
Digital watermark
Traditional watermark |
| gptkbp:usedFor |
Authentication
Copyright protection Forgery prevention |
| gptkbp:usedIn |
gptkb:newspaper
Official documents Banknotes Passports Digital images Postage stamps |
| gptkbp:visibleUnder |
Transmitted light
Certain angles |
| gptkbp:bfsParent |
gptkb:Yaron_Zilberman
gptkb:Billy_Crockett |
| gptkbp:bfsLayer |
7
|
| https://www.w3.org/2000/01/rdf-schema#label |
Watermarks
|