Khái niệm cốt lõi
The author explores the vulnerabilities of fuzzy matchers in biometric systems due to information leakage, focusing on distance evaluation and error correction mechanisms.
Tóm tắt
The content delves into the risks posed by information leakage in fuzzy matchers used in biometric security systems. It covers various scenarios, attacks, and complexities associated with leaking distance, error positions, and values below and above the threshold. The study provides insights into potential security risks and privacy concerns in practical applications.
Thống kê
"The complexity of this attack is O(qn−ε + qε) queries to σx,ε."
"The complexity of the attack for recovering x is O(qn−ε + q) queries to σx,ε."
"The complexity of the attack is O(qn−ε) queries to σx,ε."
"The complexity of the attack for recovering x is O(nq) queries to σx,ε."
"Hence, the complexity of the attack for recovering x is O(q)."
"As each coordinate has q possible values and there are n coordinates, this is done in O(nq) steps."
"In this case, d(x, y) the distance between y ∈ Znq the fresh input and x ∈ Znq the old input is leaked to the attacker regardless of the threshold."
"Given ε a threshold, x ∈ Znq a vector and Ξ a fuzzy matcher such that Ξ.Match leaks the positions of errors below the threshold, an attacker can retrieve x in O(q) queries to σx,ε."
Trích dẫn
"The provided security analyses are currently reaching their limits."
"Further research involves refining the accumulation attack as suggested above and exploring other distance metrics."
"The attacks exploiting information both below and above significantly decrease security."