22.5.11 NB-IoT / EPS NAS integrity and encryption / AES

36.523-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC)Part 1: Protocol conformance specificationRelease 17TSUser Equipment (UE) conformance specification

22.5.11.1 Test Purpose (TP)

(1)

with { successful completion of EPS authentication and key agreement (AKA) procedure }

ensure that {

when { UE in NB-S1 mode receives an integrity protected and ciphering SECURITY MODE COMMAND message instructing to start integrity protection and ciphering algorithm with AES}

then { UE transmits an integrity protected with AES and ciphering SECURITY MODE COMPLETE and starts applying the NAS Integrity protection and NAS ciphering in both UL and DL }

}

22.5.11.2 Conformance requirements

Same Conformance requirements as in TC 22.5.10, clause 22.5.10.2

22.5.11.3 Test description

22.5.11.3.1 Pre-test conditions

Same Pre-test conditions as in TC 22.5.10, clause 22.5.10.3.1

22.5.11.3.2 Test procedure sequence

Same Test procedure sequence as in TC 22.5.10, Table 22.5.10.3.2.1, except the integrity protection algorithm is AES.

22.5.11.3.3 Specific message contents

Same Specific message contents as in TC 22.5.10, Table 22.5.10.3.3.1-1, except the Type of integrity protection algorithm is changed to AES.

Table 22.5.11.3.3-1: SECURITY MODE COMMAND (Step 7)

Derivation path: 36.508 table 4.7.2-19
Information Element	Value/Remark	Comment	Condition
Selected NAS security algorithms
– Type of integrity protection algorithm	010	EPS integrity algorithm 128-EIA2 (AES)
– Type of ciphering algorithm	010	EPS encryption algorithm 128-EEA2 (AES)