Proceedings of the 9th annual ACM workshop on Privacy in the electronic society
Randomized Shellsort: a simple oblivious sorting algorithm
SODA '10 Proceedings of the twenty-first annual ACM-SIAM symposium on Discrete Algorithms
Cloning Voronoi diagrams via retroactive data structures
ESA'10 Proceedings of the 18th annual European conference on Algorithms: Part I
Randomized Shellsort: A Simple Data-Oblivious Sorting Algorithm
Journal of the ACM (JACM)
Improvements on a privacy-protection algorithm for DNA sequences with generalization lattices
Computer Methods and Programs in Biomedicine
Improving evolutionary solutions to the game of mastermind using an entropy-based scoring method
Proceedings of the 15th annual conference on Genetic and evolutionary computation
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In this paper, we study the degree to which a genomic string, $Q$,leaks details about itself any time it engages in comparison protocolswith a genomic querier, Bob, even if those protocols arecryptographically guaranteed to produce no additional information otherthan the scores that assess the degree to which $Q$ matches stringsoffered by Bob.We show that such scenarios allow Bob to play variantsof the game of Mastermind with $Q$ so as to learn the complete identityof $Q$.We show that there are a number of efficient implementationsfor Bob to employ in these Mastermind attacks, depending on knowledgehe has about the structure of $Q$, which show how quickly he candetermine $Q$.Indeed, we show that Bob can discover $Q$ using anumber of rounds of test comparisons that is much smaller than thelength of $Q$, under various assumptions regarding the types of scoresthat are returned by the cryptographic protocols and whether he can useknowledge about the distribution that $Q$ comes from, e.g., usingpublic knowledge about the properties of human DNA.We also providethe results of an experimental study we performed on a database ofmitochondrial DNA, showing the vulnerability of existing real-world DNAdata to the Mastermind attack.