Dr. Nicholas D. Beser Profile

Dr. Nicholas D. Beser

Senior Staff at Johns Hopkins Univ Applied Physics Lab

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Proceedings Article | 19 November 2003 Paper

Authentication of digital video evidence

Nicholas Beser, Thomas Duerr, Gregory Staisiunas

Proceedings Volume 5203, (2003) https://doi.org/10.1117/12.512555

KEYWORDS: Video, Video surveillance, Image compression, Computer security, Human-machine interfaces, Forensic science, Digital video recorders, Standards development, Inspection, Reliability

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In response to a requirement from the United States Postal Inspection Service, the Technical Support Working Group tasked The Johns Hopkins University Applied Physics Laboratory (JHU/APL) to develop a technique tha will ensure the authenticity, or integrity, of digital video (DV). Verifiable integrity is needed if DV evidence is to withstand a challenge to its admissibility in court on the grounds that it can be easily edited. Specifically, the verification technique must detect additions, deletions, or modifications to DV and satisfy the two-part criteria pertaining to scientific evidence as articulated in Daubert et al. v. Merrell Dow Pharmaceuticals Inc., 43 F3d (9th Circuit, 1995). JHU/APL has developed a prototype digital video authenticator (DVA) that generates digital signatures based on public key cryptography at the frame level of the DV. Signature generation and recording is accomplished at the same time as DV is recorded by the camcorder. Throughput supports the consumer-grade camcorder data rate of 25 Mbps. The DVA software is implemented on a commercial laptop computer, which is connected to a commercial digital camcorder via the IEEE-1394 serial interface. A security token provides agent identification and the interface to the public key infrastructure (PKI) that is needed for management of the public keys central to DV integrity verification.

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