Security Flaws Found in Police and Military Radio Encryption

 

Cybersecurity experts have uncovered significant flaws in encryption systems used by police and military radios globally, potentially allowing malicious actors to intercept secure communications. 

Background and context 

In 2023, Dutch security researchers from Midnight Blue unearthed an intentional backdoor in TETRA (Terrestrial Trunked Radio) encryption algorithms used in radios deployed by law enforcement, intelligence agencies, and military organizations worldwide. This discovery led the European Telecommunications Standards Institute (ETSI) to recommend users implement additional end-to-end encryption (E2EE) for sensitive communications. 

The same research team has now identified that at least one version of the TCCA-endorsed E2EE solution contains similar flaws. The encryption algorithm analyzed starts with a 128-bit key but reduces it to just 56 bits before encrypting data, making it vulnerable to unauthorized access. Additionally, researchers discovered a second vulnerability that could allow attackers to send deceptive messages or replay legitimate communications.[…]
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