| 摘要 |
Some implementations may provide a computer-implemented method for validating a digital document, the method including: receiving, at a computing device, the digital document comprising at least two digital watermarks, the digital document issued by a central entity; retrieving a first digital watermark from the digital document, the first digital watermark visually presented at a first time point; retrieving a second digital watermark from the digital document, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and reading the digital document based on the retrieved first and second digital watermarks. |
| 主权项 |
1. A computer-implemented method for reading a digital identification document, the method comprising:
receiving, at a computing device, the digital identification document comprising at least two digital watermarks, the digital identification document issued by a central entity; retrieving a first digital watermark from the digital identification document, the first digital watermark visually presented at a first time point; retrieving a second digital watermark from the digital identification document such that a sequence of digital watermarks is retrieved, the sequence comprising the first digital watermark and the second digital watermark, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and validating the digital identification document as authentic based on the first digital watermark, the second digital watermark, as well as a sequential order of the sequence of digital watermarks. |
