BAN may refer to:Balinese language (ISO 639 alpha-3, "ban")Bangladesh at the Olympics (IOC country code)Basel Action NetworkBiblioteka Akademii Nauk, the Library of the Russian Academy of SciencesBody Area NetworkBritish Approved NameBulgarian Academy of SciencesBurrows–Abadi–Needham logicBurrows–Abadi–Needham logic (BAN logic) used to analyse authentication protocols… (More on Ban)