ICT Systems Security and Privacy Protection: 30th IFIP TC 11 by Hannes Federrath, Dieter Gollmann

By Hannes Federrath, Dieter Gollmann

This booklet constitutes the refereed complaints of the thirtieth IFIP TC eleven overseas details safety and privateness convention, SEC 2015, held in Hamburg, Germany, in might 2015. The forty two revised complete papers provided have been conscientiously reviewed and chosen from 212 submissions. The papers are geared up in topical sections on privateness, net protection, entry keep an eye on, belief and identification administration, community defense, safeguard administration and human elements of protection, software program protection, utilized cryptography, cellular and cloud providers protection, and cyber-physical platforms and demanding infrastructures security.

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Example text

The semi-honest variant of the protocol in [12] also has linear complexity O(d), as the client computing the result and the server invoke the pseudorandom permutation (PRP) d times, while the other client invokes the PRP, 2d times. On the other hand, the computational overhead in [13] is quadratic O(d2 ), as it involves a joint PSI protocol (plus public key encryption of the dataset elements). The protocol in [15] also has quadratic complexity, as it involves O(d2 ) BGN public key encryption operations.

Therefore, we are to the best of our knowledge the first to provide such an analytical estimate. Our estimate proves that the number of rounds to uniquely identify Alice’s set of friends by the HS-attack is O( p1 ), while it is O( p12 ) to classify all friends with some error rate by the SDA. The probability 0 < p < 1 denotes the least probability in the distribution of Alice’s traffic to her friends. Although this work mainly addresses the anonymity of the Threshold-Mix, it might be generalisable to analyse the anonymity of other Mix variants like the Pool-Mix [29] that models Mixmaster.

In contrast to these, low-latency systems like 2 This attacker can observe any link in the network and can thus observe the anonymity sets. Towards Relations Between the Hitting-Set Attack 37 Tor [13] and JAP [3,19] (as applied in practice) do not try to withstand a global attacker in their design. 1 Related Works Our work is concerned with passive traffic analysis attacks [29]. These rely solely on external traffic observations of an anonymity system. The idea of combinatorial traffic analyses was first discussed by Raymond [29] who also sketched the “intersection attack”.

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