VIDEO USERS MUST GUARD AGAINST TAMPERING CLAIMS, WARNS IDIS
17 Apr 2021
Proving integrity of footage to become increasingly important
Growing concern about deep-fake videos will make it
increasingly important to be able to demonstrate the integrity of video
evidence, warn South Korea’s largest in-country video tech manufacturer IDIS.
Rapid advances in digital video manipulation techniques, and
a rise in alleged deep-fake celebrity videos being reported in the news, will
put pressure on both video tech users and on prosecutors to demonstrate the
integrity of any footage they use.
“As we look ahead, wherever video is presented for use as legal
evidence, or as part of internal disciplinary proceedings, we will see more
attempts to assert that footage is not genuine. Courts will dismiss evidence
where tampering cannot be ruled out,” says Dr Peter Kim, Global Technical
Consultant, IDIS.
“Any challenge to the integrity of video evidence, if not
countered, risks undermining the value of the entire video solution. This is
particularly true in applications where investigating and prosecuting
wrongdoing is a key function of the camera system. So, it will be vital that
users can demonstrate beyond doubt that their footage has not been tampered
with in any way.”
IDIS, which supplies complete, end-to-end video solutions
for applications ranging from high-risk critical infrastructure to commercial settings,
has created protection of video footage integrity through its patented Chained
Fingerprint™ algorithm.
IDIS recorders use Chained Fingerprint to ensure the
integrity of the recorded and exported video data. Each frame is assigned a
unique numerical ‘fingerprint’, calculated by relating its own pixel value to
the fingerprint of the previous frame. This means that every single image frame
of the video is linked by an encryption ‘chain’ with its neighbouring image
frames. The encrypted chain is stored as part of the video data when the video
is recorded or exported as a video clip using the IDIS ClipPlayer. Before
playback, the ClipPlayer scans video and recalculates the fingerprint chains of
the video data. If any part of the image frame is tampered with, the
fingerprint chain will be broken and will not match the chain value calculated
at the time of video export, prompting a flag.
“As organisations look to upgrade or invest in new video
solutions, protecting themselves against claims of video evidence tampering
should be high on their priority list,” adds Kim.
IDIS has created protection of video footage integrity through its patented Chained Fingerprint algorithm
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