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Content for TR 33.815 Word version: 16.0.1

0… 5…

5 Key Issues p. 8

5.1 Introduction p. 8

5.2 Key issue #1: Establishing temporary security for PARLOS session p. 8

5.2.0 Introduction p. 8

5.2.1 Potential security threat p. 8

5.2.2 Potential security requirements p. 9

5.3 Key Issue #2: Support for Unauthenticated UEs access to RLOS using EPC p. 9

5.3.1 Key issue details p. 9

5.3.2 Potential Security threats p. 9

5.3.3 Potential security requirements p. 9

5.4 Key Issue #3: Authorization of use of PARLOS service. p. 9

5.4.1 Key issue details p. 9

5.4.2 Potential Security threats p. 9

5.4.3 Potential security requirements p. 9

5.5 Key Issue #4: User awareness of use of PARLOS service. p. 10

5.5.1 Key issue details p. 10

5.5.2 Potential Security threats p. 10

5.5.3 Potential security requirements p. 10

6 Solutions p. 10

6.1 Solution #1 AS and NAS security for RLOS services p. 10

6.1.1 Introduction p. 10

6.1.2 Solution details p. 11

6.1.2.1 PARLOS Procedure p. 11

6.1.2.2 Key Hierarchy for PARLOS p. 12

6.1.3 Evaluation p. 12

6.2 Solution #2 AS and NAS security based on the emergency call procedures p. 13

6.2.1 Introduction p. 13

6.2.2 Solution details p. 13

6.2.3 Evaluation p. 13

7 Conclusions p. 15

$ Change History p. 16