A serious weakness has been found in proprietary encryption cipher TETRA (TErrestrial Trunked RAdio) standard, that is used by police and other organizations.

Researchers Carlo Meijer, Wouter Bokslag, and Jos Wetzels from Midnight Blue who discovered the issue, suggest it may be an intentional backdoor.

The description of CVE-2022-24402 is “The TEA1 algorithm has a backdoor that reduces the original 80-bit key to a key size which is trivially brute-forceable on consumer hardware in minutes.”.