Researchers Find Deliberate Backdoor in Police Radio Encryption Algorithm

Kim Zetter, *Ars Technica*, 25 Jul 2023

Researchers with Netherlands-based security consultancy Midnight Blue
have uncovered a secret backdoor in technology long used for critical
data and voice radio communications worldwide. The backdoor resides in
an algorithm embedded within commercially sold devices that transmit
encrypted data and commands, allowing users to eavesdrop on
communications and potentially hijack critical infrastructure. The
researchers found the backdoor and four other flaws in the European
Telecommunications Standards Institute's Terrestrial Trunked Radio
(TETRA) standard in …

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