| 摘要 |
A system for protecting digital images provided to a recipient against unauthorized use and transfer including a scarrer (2) for operating on the digital image (10) to cause at least one encrypted scar to appear on the image (16h which other than bearing the scar may be used and manipulated by a recipient and a descarrer (22) operated by a decryption key for removing the at least one encrypted scar from the image. |
