Critical Flaw Discovered: NATO Radio Encryption Algorithm Broken

Researchers from the Chaos Computer Club have uncovered a critical vulnerability in HALFLOOP-24, the encryption algorithm used by the US military and NATO. This algorithm protects the automatic link establishment protocol in high-frequency radio, but researchers demonstrated that just two hours of intercepted radio traffic are sufficient to recover the secret key. The attack exploits a flaw in HALFLOOP-24's handling of the 'tweak' parameter, using differential cryptanalysis to bypass significant portions of the encryption process and extract the key. This vulnerability compromises communication confidentiality and enables denial-of-service attacks. The research, published in two papers, highlights a serious security risk and underscores the importance of robust encryption algorithms.