Dahua Rigs Fever Cameras, Covers UpBy Ethan Ace and John Honovich, Published Nov 20, 2020, 08:23am EST
IPVM testing has verified Dahua rigged their fever cameras, with the company generating massive profits and exposing the public to increased coronavirus risks. Dahua has not publicly acknowledged this and refused to answer questions.
The two-minute video below overviews what happened:
The Bad - Use of Rigged Systems
Dahua's overseas profits surged in Q2 2020 (April, May, June) as the first wave of coronavirus swept the world and Dahua rushed in with a new fever camera system that numerous Fortune 500 companies (like Amazon), theme parks like Six Flags, government facilities, and even hospitals bought as they tried to reduce the spread of the virus.
The problem was that Dahua rigged the 'thermal temperature' system to report results that regularly were more normal than the surface readings captured. This helped them show 'normal' temperatures for the highly irregular marketing claims they made, such as hats, ski masks, helmets, or crowds of people getting off trains:
However, it significantly increased the risk of missing people with elevated temperatures and letting feverish people pass into facilities.
In May 2020, after extensive testing and input from Dahua's China engineering team, IPVM published our test report exposing and warning about the irregularities in Dahua's system and what they referred to as their 'compensation algorithm'.
The Good - Substantially Derigged Now
At some point thereafter, Dahua quietly released new firmware, with no release notes shared, that substantially derigged the 'compensation algorithm', reducing Dahua's ability to show normal readings of people with helmets, at bad angles, on skateboards, etc. IPVM testing showed that, on the positive side, when people are properly positioned, directly facing the camera, without the face obscured, it substantially reduced the likelihood of elevated temperatures being missed, compared to the original firmware
Note: we have updated our original Dahua test report with the new findings, new firmware version, and other technical details.
The Bad - No Notice From Dahua
Dahua has given no public notice about this substantial change and refused to address this with IPVM. On November 9, 2020, Dahua responded to our initial inquiry about firmware changes asking us what we felt had changed:
Dahua followed up on November 10, 2020, saying they would get us an answer that night:
No answer was ever provided.
Six days before publishing, on November 13, 2020, we sent Dahua an extensive writeup on our findings explaining how we found that Dahua had an algorithm that manipulated temperature readings and subsequently significantly reduced it in subsequent firmware.
Dahua acknowledged receipt of the email but provided no answer nor comment.
The Bad - Many / Most Still Using Rigged Firmware
It is likely that many Dahua fever camera users are still using rigged firmware delivered to them in the peak sales time frame of April, May, and June, as many do not regularly upgrade firmware (a manual process), especially unless the manufacturer directs them.
These organizations not only may have been damaged by letting feverish people infected by coronavirus inside their facilities, but they may also continue to do so until Dahua properly notifies and ensures the firmware is changed.
Must Be Held Accountable
Justice demands Dahua be held accountable. They rushed out a medical device at the start of a deadly pandemic. They marketed it in ways that violated science and standards. They designed the 'compensation algorithm' to report temperatures manipulated from the actual thermal readings. They made a huge amount of money and the buyers of these systems were left at undisclosed risk of their employees, customers, and visitors trusting this hiddenly rigged system.
We have provided a copy of our reporting to the Australian TGA, the US FDA, and the UK MHRA. We encourage anyone using or being screened by these systems to notify their relevant public health authority of this risk.
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