Cryptanalysis of HALFLOOP Block Ciphers: Destroying HALFLOOP-24

ePrint Report: Cryptanalysis of HALFLOOP Block Ciphers: Destroying HALFLOOP-24

Gregor Leander, Shahram Rasoolzadeh, Lukas Stennes

HALFLOOP is a family of tweakable block ciphers that are used for encrypting automatic link establishment (ALE) messages in high-frequency radio, a technology commonly used by the military, other government agencies, and industries that require high robustness in long-distance communications. Recently, it was shown in [DDLS22] that the smallest version of the cipher, HALFLOOP-24, can be attacked within a practical time and memory complexity. However, …

ale automatic block ciphers cryptanalysis eprint report family government government agencies high industries link messages military radio report robustness technology