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We propose the safe treatment of the certificate of authorization in this article. We insert the watermark in the certificate of authorization. Both of the owner and grantee keep the certificate of authorization. We encrypt the file of the certificate of authorization and watermark with different key to produce the file of cipher text. Both of the owner and grantee keep their files. When both sides...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.