This document summarizes a seminar presentation on blind authentication, a secure crypto-biometric authentication protocol. The presentation discusses biometrics and biometric authentication systems, then defines blind authentication as a protocol that only reveals a user's identity and no other information to authenticating servers. It describes the enrollment and authentication processes, which use cryptography techniques like encryption to protect biometric templates and allow for template revocation. The presentation highlights advantages like fast, secure authentication without compromising accuracy or privacy by revealing personal information like biometric templates. It concludes that blind authentication provides real-time verification with minimal user-server interaction and leaves room for further work on secure enrollment protocols.

1. A
Seminar
ON
Blind Authentication: A Secure Crypto-Biometric Authentication
Protocol
OFOF
M.C.A.M.C.A.
ByBy
Pranjul Mishra (2014024000132)Pranjul Mishra (2014024000132)
Under the Guidence of
Mr. M.Hasan
Department of Computer Science and Engineering
Madan Mohan Malaviya University of Technology Session(2015-16)

2. CONTENTS
1. Biometrics
2. Biometric Authentication System
3. Different types of biometric systems
4. Privacy concerns in Biometric authentication systems
5. What is Blind Authentication ?
6. Features of Blind Authentication
7. Previous work
8. Security, Privacy and Trust
9. Blind Secure Product Protocol
10. Advantages
11. Conclusion
12. References

3. BIOMETRICS
A biometric is a physiological or behavioral
characteristic of a human being that can
distinguish one person from another and
that can be used for identification or
verification of identity.

4. Biometric Authentication System

5. Different type of biometric systems

6. Primary Concerns in a Biometric
authentication System
1. Template Protection
2. User's privacy
3. Network security

7. What is Blind Authentication?
A blind authentication protocol that means it
reveals only the identity , and no other
additional information to the user and the
authenticating server.

8. Key point of Blind Authentication
Use of cryptography primitives to bolster the
authenticating process
Encryption provides protection and ability to
revoke enrolled templates,
Reduced the concern on privacy

9. PREVIOUS WORK
Categorization of template protection schemes by Jain

10. SALTING
Invertible function defined by a key or password
Due to compromise Easy to revoke and replace with
new key
No longer secure
NON-INVERTIBLE TRANSFORM
Apply non-invertible function on the biometric template
Key must be available at the time of transformation
Eg. Robust hashing etc.
KEY BINDING AND KEY GENERATION
Computationally to decode the key or the template
It is hard to develop scheme for generate a same key
for different templates of same person.

11. Process of blind Authentication
1.Feature extraction
2.Enrollment
3.Authentication

12. ENROLLMENT

13. ALGORITHM ENROLLMENT
1: Client collects multiple sample of her biometric, B1..k
2: Feature vectors, xi, are computed from each sample
3: Client sends xi, along with her identity and public key
E, to the enrollment server
4: Enrollment server uses xi and the information from
other
users to compute an authenticating classifier (ω, τ) for
the user
5: The classifier parameters are encrypted using the
users public key: E(ωi)
6: E(ωi)s, along with the user’s identity, the encryption
key (E), and the threshold (τ), are sent to the
authentication server for registration
7: The client is then notified about success

14. AUTHENTICATION
Blind Authentication Process: the identity vectors x, w or the
intermediate results xi · wi is revealed to anyone.

15. Features of blind authentication
SYSTEM SECURITY

Server Security

Client Security

Network Security
PRIVACY

Concern of revealing personal information

Concern of being tracked

16. Server security
Hacker gains access to the template database
Client security
Hacker gains access to the user’s biometric or private key
Passive attack at the user’s computer

17. Concern of revealing personal information-Template is
never revealed to the server.
Privacy

18. ADVANTAGES OF BLIND AUTHENTICATION
• Fast and Provably Secure authentication without
trading off accuracy.
• Supports generic classifiers such as Neural
Network and SVMs.
• Ideal for applications such as biometric ATMs etc.

19. CONCLUSION
 Verification can be done in real-time with the help of
available hardware.
 Keep the interaction between the user and the server to a
minimum.
 Extensions to this work includes secure enerollment
protocols and encryption methods to reduce
computations.

20. REFERENCES
www.wikipedia.org
www.studymafiya.org

21. THANK YOUTHANK YOU

22. QUERIES ??QUERIES ??