3GPP 24.501 v20.0.0 — the document's own text
9.11.3.107 AUN3 device security key
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The purpose of the AUN3 device security key information element is to provide the security keys to the 5G-RG that is acting on behalf of an AUN3 device.
The AUN3 device security key information element is coded as shown in figure 9.11.3.107.1 and table 9.11.3.107.1.
The AUN3 device security key is a type 4 information element with a minimum length of 36 octets.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| AUN3 device security key IEI | octet 1 | |||||||
| Length of AUN3 device security key content | octet 2 | |||||||
| 0 | 0 | 0 | 0 | 0 | 0 | ASKT | octet 3 | |
| Spare | ||||||||
| Length of key content | octet 4 | |||||||
| Key content | octet 5octet n |
Figure 9.11.3.107.1: AUN3 device security key information element
Table 9.11.3.107.1: AUN3 device security key information element
| AUN3 device security key type (ASKT) (bits 1 and 2 of octet 3) | ||
|---|---|---|
| The ASKT indicates which AUN3 device security key is included in the IE.Bits | ||
| 2 | 1 | |
| 0 | 0 | Master session key is included |
| 0 | 1 | KWAGF key is included |
| All other values are unused and shall be interpreted as "Master session key is included", if received by the UE. | ||
| Key content (octets 5 to n)If ASKT is set to "Master session key included", the Key content contains the value of the Master session key as defined in 3GPP TS 33.501 [24]. If ASKT is set to "KWAGF key included", the Key content contains the value of the KWAGF key as defined in 3GPP TS 33.501 [24]. | ||