For 25+ yrs police, military, intel agencies and critical infrastructure around the world have relied on the TETRA radio standard to secure their critical communications. But now Dutch researchers have examined secret algorithms used in TETRA and found something startling -- an intentional backdoor. This and other issues the researchers found would allow malicious actors to decrypt communications and also, in some cases, send malicious communication to radios to affect critical infrastructure or disrupt police operations and more.
https://www.wired.com/story/tetra-radio-encryption-backdoor/

ME (falling to my death in an elevator shaft): lol shaft