Product manual

System description, DECT air interface
Technical Product Manual - DCT1800-GAP
TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C
© 2006
62
Fig. 44 Authentication of fixed part
Fig. 45 Authentification of a fixed part
Portable part Fixed part
Authentication request
- Authentication algorithm type (DSAA)
- Authentication key type (UAK)
- Random number (RAND-P)
Authentication reply
- Response (RES2)
- Number (RS)
Fixed part authenticated
UAK (subscription data)
UAK, B1 => K
FP calculates RES2 based on K, RS
RAND-P
UAK, B1 => K
PP calculates XRES2 based on RS,K,
RAND-P . If RES2 = XRES2 then FP
authenticated
UAK (subscription data)
030
A
22
K
RS
KS'
RAND-P
RES2
A
21
A
22
K
RS
KS
'
RAND-P
XRES2
Authentication process in PP
Authentication process in FP
Authentication
request message
verification
process
in PP
FP is authenticated
=
A
21
RS to PP
RES2 to PP
RES2
031