Recently,　the　network　security　has　been　becoming　part　of　the　national　strategy　due　to　the　frequent　attack　events.　Reliable　online　identify　authentication　is　one　of　key　issues　for　the　Internet　application　and　the　biometric　authentication　has　drawn　wide　attentions　due　to　its　consistency　between　the　physical　identities　and　digital　identities.　The　biometric　template　protection　has　been　conducted　in　these　years　to　enhance　its　security　and　privacy.　Firstly,　the　security　problems　in　a　biometric　authentication　system　are　analyzed,　and　the　scope　and　content　of　biometric　template　protection　in　biometric　system　are　presented.　Then,　the　features,　effectivenesses　and　applications　of　different　biometric　template　protection　technologies　are　summarized　based　on　recent　works,　including　BioHashing,　noninvertible　transformation,　key　binding　and　key　generation.　The　main　idea,　the　representative　work　and　the　specialties　of　each　method　are　explained.　Additionally,　the　privacy,　practicability,　sensitiveness,　security　and　authentication　performance　of　the　typical　approaches　are　summarized　and　compared.　In　further,　the　multi-biometric　combination　is　introduced,　which　includes　multi-modal　biometrics　and　different　features　from　the　same　biometric.　Finally,　the　limitation　and　weakness　of　the　current　technologies　are　analyzed,　and　the　future　research　is　discussed.　©　2016,　Science　Press.　All　right　reserved.