1. A Secure Anonymity Preserving Authentication Scheme for Roaming Service in Global Mobility Networks
Source: Wireless Personal Communications, ahead of print, online 19 May 2017
Author: Vanga Odelu, Soumya Banerjee, Ashok Kumar Das, Samiran Chattopadhyay, Saru Kumari, Xiong Li, Adrijit Goswami
Speaker: Nguyen Ngoc Tu
Date: 2017/06/15
Green: environmentally friendly

2. Introduction Scenario Internet Services
Intercept: Delete, modify, fabricate ; corrupt: clients
Services

3. Motivations Zhao et al. (2014)
Vulnerable to: Known session-specific temporary information attack; Privileged-insider attack;
No provision for revocation and reregistration
This proposed scheme
Proposed a scheme to achieve:
User anonymity
Resist most known attacks
Intercept: Delete, modify, fabricate ; corrupt: clients
Zhao, D., Peng, H., Li, L., & Yang, Y. (2014). A secure and effective anonymous authentication scheme for roaming service in global mobility networks. Wireless Personal Communications, 78(1), 247–269

4. Outline
Introduction
Proposed scheme
Conclusions
Comments

5. Proposed scheme: Outline
(1) Registration
Registration
(2) Authentication and key agreement at visited network
Contribution

6. Proposed scheme (1/5) Elliptic curve: Base point: (1) Registration
Secret key:
Public key:
Select
Compute
Compute
Store
into
Store
Compute
AAKE:
into its database
Store
into

7. Proposed scheme (2/5) AKA at visited network inputs Compute Verify
AAKE:

8. Proposed scheme (3/5) AKA at visited network Select and compute
Verify
Compute
AAKE:
Check and retrieve
Verify

9. Proposed scheme (4/5) AKA at visited network Compute Retrieve Verify
AAKE:
Verify
Compute

10. Proposed scheme (5/5) AKA at visited network Compute Compute Verify
AAKE:
Verify
Session key
where

11. Computation cost comparison
Performance comparison(1/3)
Computation cost comparison
AAKE:
[42] Zhao, D., Peng, H., Li, L., & Yang, Y. (2014). A secure and effective anonymous authentication scheme for roaming service in global mobility networks. Wireless Personal Communications, 78(1), 247–269.
[28] Mun, H., Han, K., Lee, Y. S., Yeun, C. Y., & Choi, H. H. (2012). Enhanced secure anonymous authentication scheme for roaming service in global mobility networks. Mathematical and Computer Modelling, 55, 214–222.
[26] Memon, I., Hussain, I., Akhtar, R., & Chen, G. (2015). Enhanced Privacy and Authentication: An Efficient and Secure Anonymous Communication for Location Based Service Using Asymmetric Cryptography Scheme. Wireless Personal Communications, 84(2), 1487–1508.

12. Communication cost comparison
Performance comparison(2/3)
Communication cost comparison
AAKE:
[42] Zhao, D., Peng, H., Li, L., & Yang, Y. (2014). A secure and effective anonymous authentication scheme for roaming service in global mobility networks. Wireless Personal Communications, 78(1), 247–269.
[28] Mun, H., Han, K., Lee, Y. S., Yeun, C. Y., & Choi, H. H. (2012). Enhanced secure anonymous authentication scheme for roaming service in global mobility networks. Mathematical and Computer Modelling, 55, 214–222.
[26] Memon, I., Hussain, I., Akhtar, R., & Chen, G. (2015). Enhanced Privacy and Authentication: An Efficient and Secure Anonymous Communication for Location Based Service Using Asymmetric Cryptography Scheme. Wireless Personal Communications, 84(2), 1487–1508.

13. Security requirements comparison
Performance comparison(3/3)
Security requirements comparison
AAKE:

14. Conclusions Secure against various known attacks
But high computational cost
Automated Validation of Internet Security Protocols and Applications.