Researchers find ‘backdoor’ in encrypted police and military radios::The TETRA standard is used in radios worldwide. Security researchers have found multiple vulnerabilities in the underlying cryptography and its implementation, including issues that allow for the decryption of traffic.
I probably could have done better with the wording on the link to a video contradicting what I’d said. It’s not meant to be taken seriously but that only really becomes obvious when you click through to find a video on how to make use of its flaws to disrupt traffic and listen in. Not everybody is going to do that though.