Article
How e-Dex Captures and Seals It
e-Dex's Certificate Generator includes a dedicated CCTV / Video Evidence template that prompts for exactly these particulars — camera id and location, DVR/NVR make and model, recording window, source device, the multi-algorithm hashes of the exported file, an integrity verdict, the chain-of-custody log, a counsel-reviewed declaration and signature blocks. You fill the facts; the template enforces the structure so nothing important is left blank.
Once generated, the certificate is sealed and made tamper-evident:
- A SHA-256 integrity seal binds the certificate's contents.
- An optional PAdES digital signature applies the analyst's DSC (via a PKCS#12 keystore, or a self-signed certificate for testing).
- An optional RFC-3161 trusted timestamp proves when the certificate existed.
- A register number identifies it, and superseded certificates are tracked if a revision is later issued.
See a sample CCTV / Video Evidence Certificate
This is a real certificate produced by e-Dex, shown with fictitious case data, for illustration only. Recompute the SHA-256 seal printed on it to watch the integrity check work.
Does hashing alone make CCTV footage admissible?
No. A hash proves a file is unchanged since it was computed, but it says nothing about where the footage came from or whether it was continuous. Source-device identity, the recording window and the chain of custody matter just as much. A complete certificate combines all of these, which is why hashing is necessary but not sufficient on its own.
Can e-Dex generate and re-verify a CCTV certificate offline?
Yes. e-Dex is a free offline Windows tool whose Certificate Generator has a dedicated CCTV and video evidence template that prompts for the camera, recorder, recording window, export and multi-algorithm hashes, then seals the result with a SHA-256 integrity seal and optional signature and timestamp. Its Evidence Viewer re-verifies the certificate entirely offline, with no upload or internet connection needed.