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Authenticator [ɔː'θentikeitə] n
comp., MS Dilyswr (The app that generates security codes that change frequently as part of two-step verification)
 English thesaurus
authenticator [ɔː'θentikeitə] n
mil., logist. A letter, number or group of letters and/or numbers, attesting to the authenticity of a transmission, a message or data, or to the identity of a net, station or user. (FRA)