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DS2 Network Guide
How to Congure Watermarking
The unit supports the facility to watermark recorded images. It is also possible to produce a
watermark certicate which proves that an image has not been altered or tampered with, using a
unique MD5 signature which will change if the image les are changed.
This process can assist with the audit trail process for digital recorded video. The MD5 signature is
a unique signature that is automatically allocated by the unit by using le information and generating
the unique signature.
To congure and produce a watermark certicate
Ensure the Tools option has been enabled in the Advanced Features menu:
1. Select Tools -> Watermarking.
2. Enter the start time and date for the period that is to be reviewed.
3. Enter the nish time and date for the period that is to be reviewed.
4. Select partition information button, the recorded les within the specied time period will
be displayed within the partition information summary.
5. Highlight the les (partition) that you intend to allocate a watermark to.
6. It is possible to view the index information by selecting the get index info button, the
video index information will be displayed.
7. If the Operator that is generating the watermark certicates is to be logged, enter the
report author information, this will be added to the certicate.
8. Enter the step size information; this identies the ‘skip’ distance between bytes used in
the watermark calculations, default 256 bytes.
9. To generate the watermark codes that will be linked to the partition selected press the
watermark button.
Note: The smaller the step size the longer the calculation process. Do not press any buttons while
the unit is calculating. The progress of the process is displayed in the status bar.
10. When the watermark codes have been generated a certicate must be created by
pressing the create certicate button, this certicate should then be printed and
archived. This should form part of the customer security procedure regarding incidents.