1. 2G[1] and 3G[2] Security
&
Charging, Data Rating, Authentication Concepts
by Valeh Sabziyev

2. 2G Security
Identity Confidentiality
MS Authentication
A3 algorithm
Information Confidentiality
A8 & A5 algorithms

3. 2G Authentication Procedure

4. 2G Authentication Procedure

5. 2G Ciphering Key Setting

6. 2G Ciphering

7. 3G Security
Identity Confidentiality
MS and Network Authentication
f1, f2, f3, f3, f5 functions
Information Confidentiality
f8 function
Information Integrity
f9 function

8. 3G Vector Generation

9. 3G Authentication Vectors

10. 3G Authentication Vectors

11. Security mode setup

12. Integrity Function

13. Ciphering Function

14. f9[3]

15. f8[3]

16. KASUMI[4]
- 8-round Feistel cipher
- 64-bit data block
- 128-bit key

17. Data rating, charging, RADIUS
authentication

18. RADIUS protocol
- On top of UDP
- Client-Server Model
- Uses shared secret
- Extensible

19. RADIUS message format[5]

20. Access Request

21. Access Response

22. DIAMETER Message Format[6]

23. Credit Control Request

24. References
1. 3GPP TS 43.020, Security Related Network Functions
2. ETSI TS 133 102, 3G Security, Security Architecture
3. 3GPP TS 35.201, f8 and f9 Specifications
4. 3GPP TS 35.202, KASUMI Specifications
5. RFC 2865, Remote Authentication Dial-In User Service
6. RFC 3588, Diameter Base Protocol

25. thanks for your
time.