| 1. |
- Abidin, Aysajan, 1983, et al.
(författare)
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A Privacy-preserving Biometric Authentication Protocol Revisited
- 2014
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Ingår i: In Proceedings of YACC 2014, Porquerolles island, France, June 2014.
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Konferensbidrag (refereegranskat)abstract
- Biometric authentication establishes the identity of an individual based on biometric templates (i.e. fingerprints, retina scans etc.). Although biometric authentication has important advantagesand many applications, it also raises serious security and privacy concerns. In this parer, we investigatea privacy-preserving biometric authentication protocol that has been proposed by Bringer et al. andadopts a distributed architecture (i.e. multiple entities are involved in the authentication process). Wepresent an attack algorithm that can be employed to mount a number of attacks on the protocol underinvestigation and propose an improved version of the Bringer et al. protocol that combats the presentedattacks.
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| 2. |
- Abidin, Aysajan, 1983, et al.
(författare)
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Attacks on Privacy-Preserving Biometric Authentication
- 2014
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Ingår i: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - 1611-3349 .- 0302-9743. ; 8788:2014, s. 293-294
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Konferensbidrag (refereegranskat)
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| 3. |
- Abidin, Aysajan, 1983-
(författare)
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Authentication in Quantum Key Distribution : Security Proof and Universal Hash Functions
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Quantum Key Distribution (QKD) is a secret key agreement technique that consists of two parts: quantum transmission and measurement on a quantum channel, and classical post-processing on a public communication channel. It enjoys provable unconditional security provided that the public communication channel is immutable. Otherwise, QKD is vulnerable to a man-in-the-middle attack. Immutable public communication channels, however, do not exist in practice. So we need to use authentication that implements the properties of an immutable channel as well as possible. One scheme that serves this purpose well is the Wegman-Carter authentication (WCA), which is built upon Almost Strongly Universal2 (ASU2) hashing. This scheme uses a new key in each authentication attempt to select a hash function from an ASU2 family, which is then used to generate the authentication tag for a message.The main focus of this dissertation is on authentication in the context of QKD. We study ASU2 hash functions, security of QKD that employs a computationally secure authentication, and also security of authentication with a partially known key. Specifically, we study the following.First, Universal hash functions and their constructions are reviewed, and as well as a new construction of ASU2 hash functions is presented. Second, security of QKD that employs a specific computationally secure authentication is studied. We present detailed attacks on various practical implementations of QKD that employs this authentication. We also provide countermeasures and prove necessary and sufficient conditions for upgrading the security of the authentication to the level of unconditional security. Third, Universal hash function based multiple authentication is studied. This uses a fixed ASU2 hash function followed by one-time pad encryption, to keep the hash function secret. We show that the one-time pad is necessary in every round for the authentication to be unconditionally secure. Lastly, we study security of the WCA scheme, in the case of a partially known authentication key. Here we prove tight information-theoretic security bounds and also analyse security using witness indistinguishability as used in the Universal Composability framework.
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| 4. |
- Abidin, Aysajan, 1983, et al.
(författare)
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Efficient Verifiable Computation of XOR for Biometric Authentication
- 2016
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Ingår i: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - Cham : Springer International Publishing. - 1611-3349 .- 0302-9743. ; 10052, s. 284-298
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Konferensbidrag (refereegranskat)abstract
- This work addresses the security and privacy issues in remote biometric authentication by proposing an efficient mechanism to verify the correctness of the outsourced computation in such protocols. In particular, we propose an efficient verifiable computation of XORing encrypted messages using an XOR linear message authentication code (MAC) and we employ the proposed scheme to build a biometric authentication protocol. The proposed authentication protocol is both secure and privacy-preserving against malicious (as opposed to honest-but-curious) adversaries. Specifically, the use of the verifiable computation scheme together with an homomorphic encryption protects the privacy of biometric templates against malicious adversaries. Furthermore, in order to achieve unlinkability of authentication attempts, while keeping a low communication overhead, we show how to apply Oblivious RAM and biohashing to our protocol. We also provide a proof of security for the proposed solution. Our simulation results show that the proposed authentication protocol is efficient.
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| 5. |
- Abidin, Aysajan, 1983, et al.
(författare)
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Security aspects of privacy-preserving biometric authentication based on ideal lattices and ring-LWE
- 2014
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Ingår i: 2014 IEEE International Conference on Communications Workshops, ICC 2014. ; , s. 60-65
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Konferensbidrag (refereegranskat)abstract
- In this paper, we study the security of two recently proposed privacy-preserving biometric authentication protocols that employ packed somewhat homomorphic encryption schemes based on ideal lattices and ring-LWE, respectively. These two schemes have the same structure and have distributed architecture consisting of three entities: a client server, a computation server, and an authentication server. We present a simple attack algorithm that enables a malicious computation server to learn the biometric templates in at most 2N-τ queries, where N is the bit-length of a biometric template and τ the authentication threshold. The main enabler of the attack is that a malicious computation server can send an encryption of the inner product of the target biometric template with a bitstring of his own choice, instead of the securely computed Hamming distance between the fresh and stored biometric templates. We also discuss possible countermeasures to mitigate the attack using private information retrieval and signatures of correct computation.
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| 6. |
- Abidin, Aysajan, 1983, et al.
(författare)
-
Security of a Privacy-Preserving Biometric Authentication Protocol Revisited
- 2014
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Ingår i: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - Cham : Springer International Publishing. - 1611-3349 .- 0302-9743. - 9783319122809 ; 8813, s. 290-304
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Konferensbidrag (refereegranskat)abstract
- Biometric authentication establishes the identity of an individual based on biometric templates (e.g. fingerprints, retina scans etc.). Although biometric authentication has important advantages and many applications, it also raises serious security and privacy concerns. Here, we investigate a biometric authentication protocol that has been proposed by Bringer et al. and adopts a distributed architecture (i.e. multiple entities are involved in the authentication process). This protocol was proven to be secure and privacy-preserving in the honest-but-curious (or passive) attack model. We present an attack algorithm that can be employed to mount a number of attacks on the protocol under investigation. We then propose an improved version of the Bringer et al. protocol that is secure in the malicious (or active) insider attack model and has forward security.
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| 7. |
- Pagnin, Elena, 1989, et al.
(författare)
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On the Leakage of Information in Biometric Authentication
- 2014
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Ingår i: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). - Cham : Springer International Publishing. - 1611-3349 .- 0302-9743. ; , s. 265-280
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Konferensbidrag (refereegranskat)abstract
- In biometric authentication protocols, a user is authenticated or granted access to a service if her fresh biometric trait matches the reference biometric template stored on the service provider. This matching process is usually based on a suitable distance which measures the similarities between the two biometric templates. In this paper, we prove that, when the matching process is performed using a specific family of distances (which includes distances such as the Hamming and the Euclidean distance), then information about the reference template is leaked. This leakage of information enables a hill-climbing attack that, given a sample that matches the template, could lead to the full recovery of the biometric template (i.e. centre search attack) even if it is stored encrypted. We formalise this “leakage of information” in a mathematical framework and we prove that centre search attacks are feasible for any biometric template defined in Z^n_q , (q >= 2) after a number of authentication attempts linear in n. Furthermore, we investigate brute force attacks to find a biometric template that matches a reference template, and hence can be used to run a centre search attack. We do this in the binary case and identify connections with the set-covering problem and sampling without replacement.
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