Password　and　short　message　based　authentication　methods　are　currently　the　most　popular　ones　to　authenticate　mobile　users.　However,　there　are　many　security　risks　involved　in　these　authentication　methods.　This　is　because　passwords　are　mostly　static　and　SMS-based　authentication　codes　are　mostly　transmitted　in　plaintext　form　and　can　thus　be　easily　intercepted,　making　users　identities　easily　exposed　to　adversaries[1].　In　recent　years,　fingerprint　identification　and　face　recognition　technologies　have　set　off　a　huge　tide　in　the　identification　and　authentication　of　mobile　terminals.　However,　some　users　may　not　have　sufficient　fingerprint　characteristics　while　some　other　users　may　generate　a　great　number　of　impressions　by　making　some　changes　in　the　face.　The　visual　image　of　the　face　can　also　vary　greatly,　not　to　mention　that　face　recognition　is　affected　by　illumination　conditions,　areas　of　coverage,　ages,　etc.,　making　facial　recognition　very　unstable　for　authentication[2,　3].　In　this　paper,　we　propose　a　technique　in　which　we　use　IMEI　(International　Mobile　Equipment　Identity)　to　apply　the　backstage　hidden　automatic　identification　authentication　mode　for　the　user.　The　proposed　scheme　has　good　user　experience　and　can　enhance　the　practicability　of　identity　authentication.　In　addition,　compared　to　existing　authentication　schemes,　the　proposed　scheme　does　not　require　the　transmission　of　sensitive　data　in　the　authentication　process,　further　enhancing　security.　©　2018　The　Authors.　Published　by　Elsevier　Ltd.