LWM2M Security 0 urn:oma:lwm2m:oma:0:1.1 1.1 1.1 Multiple Mandatory LWM2M Server URI Single Mandatory String 0..255 bytes Bootstrap-Server Single Mandatory Boolean Security Mode Single Mandatory Integer 0..4 Public Key or Identity Single Mandatory Opaque Server Public Key Single Mandatory Opaque Secret Key Single Mandatory Opaque SMS Security Mode Single Optional Integer 0..255 SMS Binding Key Parameters Single Optional Opaque 6 SMS Binding Secret Key(s) Single Optional Opaque 16,32,48 LwM2M Server SMS Number Single Optional String Short Server ID Single Optional Integer 1..65534 Client Hold Off Time Single Optional Integer s Bootstrap-Server Account Timeout Single Optional Integer s Matching Type Single Optional Unsigned Integer 0..3 s SNI Single Optional String Certificate Usage Single Optional Unsigned Integer 0..3 s DTLS/TLS Ciphersuite Multiple Optional Unsigned Integer OSCORE Security Mode Single Optional Objlnk