Bilgisayar Mühendisliği Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1940

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Institution Author: search.filters.institutionAuthor.Sarıer, Neyire DenizPublication Index: search.filters.publicationIndex.Scopus

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  • Conference Object
    Citation - WoS: 4
    Citation - Scopus: 5
    Private Minutia-Based Fingerprint Matching
    (Springer-Verlag Berlin, 2015) Sarıer, Neyire Deniz
    In this paper, we propose an efficient biometric authentication protocol for fingerprints particularly suited for the minutia-based representation. The novelty of the protocol is that we integrate the most efficient (linear complexity) private set intersection cardinality protocol of Cristofaro et al. and a suitable helper data system for biometrics in order to improve the accuracy of the system. We analyze the security of our scheme in the standard model based on well-exploited assumptions, considering malicious parties, which is essential to eliminate specific attacks on biometric authentication schemes designed for semi-honest adversaries only. Finally, the complexity is compared to the existing provably secure schemes for fingerprint matching, which shows that the new proposal outperforms them both in semi-honest and malicious security models.
  • Conference Object
    Citation - WoS: 1
    Citation - Scopus: 1
    Security Analysis of Revocable and Bipartite Biotokens
    (IEEE, 2015-10-01) Sarıer, Neyire Deniz; Saner, Neyire Deniz
    In this paper, we analyze the security of bipartite biotokens that release a secret key hidden in the biotoken by using biometrics. We show that the biotoken encoding of 80/112/128-bit symmetric encryption keys are vulnerable to brute force attacks, whose complexity is lower than cryptographic security. Also, we present the weaknesses in the design of revocable biotokens that form the basis for bipartite biotokens. Finally, we propose countermeasures to prevent these attacks and discuss the employment of other efficient cryptographic techniques that possess provable security guarantees.