Security Data Transfer Messages (SDM)

2.9 Security Data Transfer Messages (SDM)

The following types of Security Data Transfer Messages are included in the MUP and are each identified by a different heading code H1:

2.9.1 Authentication Data Request Message (ADR)

2.9.2 Authentication Data Request Acknowledge Message (ADA)

2.9.3 Authentication Data Not Available Message (ADN)

2.9.4 Security Data Request Message (SDR)

2.9.5 Security Data Available Message (SDA)

2.9.6 Security Data Not Available Message (SDN)

2.9.7 Security Data Inquiry MTXH (SDIH)

2.9.8 Security Data Acknowledge MTXH (SDAH)

2.9.9 Security Data No Acknowledge MTXH (SDNH)

2.9.10 Security Data Inquiry MTXV (SDIV)

2.9.11 Security Data Acknowledge MTXV (SDAV)

2.9.12 Security Data No Acknowledge MTXV (SDNV)

2.9.1 Authentication Data Request Message (ADR)

Basic format:

f	e	d	c	b	a
H.....BA	D.....BA	D.....BA	D.....BA	D.....BA	fe.........BA
MOBILE STATION IDENTITY	NUMBER OF DIGITS	SPARE	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
n * 8	4	4	4	4	32
4£ n £ 5

Figure 2.9.1 Authentication Data Request Message

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 0001

d) Spare.

e) Number of digits.

See paragraph 2.4.1.f.

f) Mobile Station Identity.

See paragraph 2.4.1.g.

2.9.2 Authentication Data Request Acknowledge Message (ADA)

Basic format:

g	f	e	d	c	b	a
X.....BA	P.....BA	D.......BA	ba....BA	D.....BA	D.....BA	fe.........BA
BKEY C1....C6	SRES R1....R4	ADDITIONAL MOBILE STATION CATEGORIES	RAND C1....C7	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
24	16	4	28	4	4	32

Figure 2.9.2 Authentication Data Request Acknowledge Message

The following codes are used:

a) Transaction number.

See paragraph 2.2

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 0010

d) RAND

RAND is a random number. It consists of seven succeeding digits (C1 .. C7). The digits are hexadecimal coded. The C7 digit is transferred first. Within each digit the least significant bit is transferred first.

e) Additional Mobile Station Categories

Bit A: SIS Authetication during Location Updating procedure

0 Not SIS-Authentication

1 SIS- Authentication

Bit DCB: Spare

f) SRES

SRES (Signed Response) is a number computed from RAND using SAK. It consists of four succeeding digits (R1 .. R4). The digits are hexadecimal coded. The R4 digit is transferred first. Within each digit the least significant bit is transferred first.

g) BKEY

BKEY is a key used to decrypt the B-number. The key is computed from RAND using the SAK. It consists of six succeeding digits (C1 .. C6). The digits are hexadecimal coded. The C6 digit is transferred first. Within each digit the least significant bit is transferred first.

2.9.3 Authentication Data Not Available Message (ADN)

Basic format:

e	d	c	b	a
D.......BA	H.....BA	D.....BA	D.....BA	fe.........BA
ADDITIONAL MOBILE STATION CATEGORIES	REASON	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
4	4	4	4	32

Figure 2.9.3 Authentication Data Not Available Message

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 0011

d) Reason

Bit DCBA:

	0000	No new data sets available
	0001	Miscellaneous
	0010	Spare
	0011	Non-SIS Ms
	0100	Spare
	:	:
	1111	Spare

e) Additional Mobile Station Categories

Bit A: SIS Authetication during Location Updating procedure

0 Not SIS-Authentication

1 SIS- Authentication

Bit DCB: Spare

2.9.4 Security Data Request Message (SDR)

Basic format:

f	e	d	c	b	a
......BA	D.....BA	D.....BA	D.....BA	D.....BA	fe.........BA
MOBILE STATION IDENTITY	NUMBER OF DIGITS	PRIORITY INDI-CATION	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
n * 8	4	4	4	4	32
4< n <5

Figure 2.9.4 Security Data Request Message.

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 0111

d) Priority Indication

Bit A: 0: No old already used security data available for the MS in the MTX.

1: Old already used security data available in the MTX.

Bit B: 0: No new unused security data available for the MS in the MTX.

1: New unused security data available for the MS in the MTX.

Bit DC: Spare

e) Number of digits.

See paragraph 2.4.1.f.

f) Mobile Station Identity.

See paragraph 2.4.1.g.

2.9.5 Security Data Available Message (SDA)

Basic format:

g	f	e	d	c	b	a
X.....BA	P.....BA	D.....BA	ba....BA	D.....BA	D.....BA	fe.........BA
BKEY C1...C6	SRES R1...R4	SPARE	RAND C1...C7	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
24	16	4	28	4	4	32

Figure 2.9.5 Security Data Available Message.

The following codes are used:

a) Transaction number.

See paragraph 2.2

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 1000

d) RAND

See paragraph 2.9.2.d.

e) Spare

f) SRES

See paragraph 2.9.2.f.

g) BKEY

See paragraph 2.9.2.g.

2.9.6 Security Data Not Available Message (SDN)

Basic format:

d	c	b	a
H.....BA	D.....BA	D.....BA	fe.........BA
REASON	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
8	4	4	32

Figure 2.9.6 Security Data Not Available Message.

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 1000

c) Heading code H1 is coded 1001

d) Reason

Bit DCBA:

	0000	No new data sets available
	0001	Unknown MS
	0010	Miscellaneous
	0011	Spare
	:	:
	1111	Spare

Bit HGFE:

Spare

2.9.7 Security Data Inquiry MTXH (SDIH)

Basic format:

e	d		c	b	a
D.....BA	D.....BA		D.....BA	D.....BA	fe.........BA
NUMBER OF DIGITS	PRIORITY INDICATOR		HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
4	4		4	4	32
h	g	f
D.....BA	D.....BA	H.....BA
SPARE	NUMBER OF TRIPLETS	MOBILE STATION IDENTITY
4	4	n*8
		4<n<5

Figure 2.9.7 Security Data Inquiry MTXH Message.

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1010.

d) Priority Indicator
The coding of these indicators have the following meaning.
Bit A: 0 No old already used security data available for
the MS in the MTX.

1 Old already used security data available for the
MS in the MTX..

Bit B: 0 No unused security data available for the MS in the MTX.

1 Unused security data available for the MS in the MTX.

Bits DC: Spare

e) Number of digits

See paragraph 2.4.1.f.

f) Mobile Station Identity

See paragraph 2.4.1.g

g) Number of triplets

Number of requested triplets (1 to 8).

h) Spare.

2.9.8 Security Data Acknowledge MTXH (SDAH)

Basic format:

e	d	c	b	a
D.....BA	D.....BA	D.....BA	D.....BA	fe.........BA
SPARE	NUMBER OF TRIPLETS	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
4	4	4	4	32
i	h	g	f
X.....BA	P.....BA	D.....BA	........
BKEY C1...C6	SRES R1...R4	SPARE	RAND C1...C7
:	:	:	:
:	:	:	:
24	16	4	28

Figure 2.9.8 Security Data Acknowledge MTXH Message

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1011.

d) Number of triplets

Number of sent triplets (1 to 8).

e) Spare

f) RAND

See paragraph 2.9.2.d.

g) Spare

h) SRES

See paragraph 2.9.2.f.

i) BKEY

See paragraph 2.9.2.g.

2.9.9 Security Data No Acknowledge MTXH (SDNH)

Basic format:

e	d	c	b	a
D.....BA	D.....BA	D.....BA	D.....BA	fe.........BA
SPARE	REASON	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
4	4	4	4	32

Figure 2.9.9 Security Data No Acknowledge MTXH Message

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1100.

d) Reason

	0000	No data sets available
	0001	Unknown MS
	0010	Spare
	:	:
	1111	Spare

e) Bit DCBA:

Spare

2.9.10 Security Data Inquiry MTXV (SDIV)

Basic format:

e	d		c		b	a
D.....BA	D.......BA		D.....BA		D.....BA	fe.........BA
NUMBER OF DIGITS	PRIORITY INDICATOR		HEADING CODE H1		HEADING CODE H0	TRANSACTION NUMBER
4	4		4		4	32
h		g		f
D.......BA		D.......BA		......BA
ADDITIONAL MOBILE STATION CATEGORIES		NUMBER OF TRIPLETS		MOBILE STATION IDENTITY
4		4		n*8
				4<n<5

Figure 2.9.10 Security Data Inquiry MTXV Message.

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1101.

d) Priority Indicator

The coding of these indicators have the following meaning.

Bit A: 0 No old already used security data available for
the MS in the MTX.

1 Old already used security data available for the
MS in the MTX.

Bit B: 0 No unused security data available for the MS

in the MTX

1 Unused security data available for the MS

in the MTX.

Bits DC: Spare

e) Number of digits

See paragraph 2.4.1.f.

f) Mobile Station Identity

See paragraph 2.4.1.g

g) Number of triplets

Number of requested triplets (1 to 8).

h) Additional Mobile Station Categories

Bit A: SIS Authetication during Location Updating procedure

0 Not SIS-Authentication

1 SIS- Authentication

Bit DCB: Spare

2.9.11 Security Data Acknowledge MTXV (SDAV)

Basic format:

e		d		c		b	a
D.......BA		D.....BA		D.....BA		D.....BA	fe.........BA
ADDITIONAL MOBILE STATION CATEGORIES		NUMBER OF TRIPLETS		HEADING CODE H1		HEADING CODE H0	TRANSACTION NUMBER
4		4		4		4	32
i	h		g		f
X.....BA	P.....BA		D.....BA		b.....BA
BKEY C1...C6	SRES R1...R4		SPARE		RAND C1...C7
:	:		:		:
:	:		:		:
24	16		4		28

Figure 2.9.11 Security Data Acknowledge MTXV Message

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1110.

d) Number of triplets

Number of sent triplets (1 to 8).

e) Additional Mobile Station Categories

Bit A: SIS Authetication during Location Updating procedure

0 Not SIS-Authentication

1 SIS- Authentication

Bit DCB: Spare

f) RAND

See paragraph 2.9.2.d.

g) Spare

h) SRES

See paragraph 2.9.2.f.

i) BKEY

See paragraph 2.9.2.g.

2.9.12 Security Data No Acknowledge MTXV (SDNV)

Basic format:

e	d	c	b	a
D.......BA	D.....BA	D.....BA	D.....BA	fe.........BA
ADDITIONAL MOBILE STATION CATEGORIES	REASON	HEADING CODE H1	HEADING CODE H0	TRANSACTION NUMBER
4	4	4	4	32

Figure 2.9.12 Security Data No Acknowledge MTXV Message

The following codes are used:

a) Transaction number

See paragraph 2.2.

b) Heading code H0 is coded 1000.

c) Heading code H1 is coded 1111.

d) Reason

Coding as in paragraph 2.9.3d.

e) Additional Mobile Station Categories

Coding as in paragraph 2.9.3.e.