Lukas Stennes Video Player00:0000:00 | 59:432.00x1.50x1.25x1.00x0.75x Saal ZIGZAG Security Playlists: '38c3' videos starting here / audio We present fatal security flaws in the HALFLOOP-24 encryption algorithm, which is used by the US military and NATO. HALFLOOP-24 was meant to safeguard the automatic link establishment protocol in high frequency radio, but our research demonstrates that merely two hours of intercepted radio traffic are sufficient to recover the secret key. In the talk, we start...