16
RES1 RES2 RS RSO SACCH SAP SCCK SCH SCH/F SCH/HD SCH/HU SCK SCKN SCK-VN SDMO SDU SGCK SGSKO SMI SSCK SSI STCH SwMI TCH TCH/2.4 TCH/4.8 TCH/7.2 TEA TEI TMO TM-SCK TNMM UAK U-PLANE USSI XRES1 XRES2
4
ETSI EN 300 392-7 V2.3.1 (2006-06)
RESponse 1 RESponse 2 Random Seed Random Seed for OTAR Slow Associated Control CHannel Service Access Point Sealed Common Cipher Key Signalling CHannel Full Slot Signalling CHannel Half-slot Downlink Signalling CHannel Half-slot Uplink Signalling CHannel Static Cipher Key Static Cipher Key Number SCK-Version Number Secure Direct Mode Operation Service Data Unit Sealed GCK Sealed GSKO Short Management Identity Sealed SCK Short Subscriber Identity STealing CHannel Switching and Management Infrastructure Traffic CHannel Traffic CHannel for 2,4 kbs circuit mode data Traffic CHannel for 4,8 kbs circuit mode data Traffic CHannel for 7,2 kbs circuit mode data TETRA Encryption Algorithm (used with specific numeric algorithm identity e.g. TEA1) TETRA Equipment Identity Trunked Mode Operation SCK used in Trunked Mode operation TETRA Network Mobility Management (refers to the SAP) User Authentication Key User-PLANE Unexchanged Short Subscriber Identity eXpected RESponse 1 eXpected RESponse 2
Air Interface authentication and key management mechanisms
Authentication is optional, however, if it is used it shall be as described in this clause.
4.1
Air interface authentication mechanisms
4.1.1
Overview
The authentication method described is a symmetric secret key type. In this method one secret, the authentication key, shall be shared by each of the authenticating parties, and there should be strictly two parties with knowledge of the secret. Authentication shall be achieved by the parties proving to each other knowledge of the shared secret.
ETSI