Questions · Video software
How do you prove that an exported video has not been tampered with?
With a digital fingerprint of the file —what is called a hash— that the system calculates on export and that changes completely if a single frame is modified. Whoever receives the video can recalculate that fingerprint and compare it. Some platforms add a digital signature over the export, and their player warns you if the file has been altered.
That fingerprint has to be recorded in the report or the handover letter, not just left inside the memory stick. And it is worth handing over the data that goes with the video as well: camera identification, timestamps, and how the system clock was synchronised, because a time that does not match another system's is the most common objection.
The other half is the chain of custody, and the software does not solve that one: it is leaving a record of who exported, when, on what medium, who it was handed to and who has had it since. The system audit log provides the first link; the others are procedural and it is worth having them written down before you need them. How it works in each particular procedure is a legal question and is worth reviewing with whoever is handling the matter.
Where it is set out in full.
Where you can see it working.
On the IRIS Neural website, on real scenes.
All the questions.
Five hundred and forty-four, grouped by topic. Each with its own page.
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See it working.
A written answer is enough to decide whether it interests you. To know whether it works at your site you have to see it on a real scene, with the image as it is and, on top of it, what the system understands from it. That is on the IRIS Neural website, which is the group's product.