توضیحات
ABSTRACT
What is Data Mining? Extracting implicit un-obvious patterns and relationships from a warehoused of data sets. This information can be useful to increase the efficiency of the organization and aids future plans. Can be done at an organizational level. By Establishing a data Warehouse Can be done also at a global Scale. The ONLY information that can be leaked is the information that we can get as an overall output from the computation (aggregation) process Users are not Malicious but can honestly curious All users are supposed to abide to the SMC protocol Otherwise, for the case of having malicious participants is not easy to model! [Penkas et al, Argawal]
INTRODUCYION
Both are estimation techniques Kalman is stateless In Kalman filter case we knew the distribution and estimation is used to validate whether the trend of the data matches that distribution In Bayesian Inference the observation data is used to adjust the prior hypothesis (probability distribution) Suppose a client randomizes Age records using a uniform random variable [-50,50] If the aggregator receives value 120, with 100% confidence it knows that actual age is Simply randomization does not guarantee absolute privacy ! 70 How to achieve better randomization scheme “Limiting Privacy Breaches in Privacy Preserving Data Mining” Evfimievski et al Define an evaluation metric of how privacy preserving a scheme is. Based on the developed metric, develop a randomization scheme that abides to this metric Information Theoretic Approach: Computes the average information disclose in a randomized attribute by computing the mutual information between the actual and the randomized attribute Privacy breach Defines a criteria that should be satisfied for a randomization scheme to be privacy preserving A privacy breach occurs when the disclosure of a randomized value to the aggregator reveals that a certain property of the “individual” input holds with high probability yi Q(x) x Is defined in terms of the transitive probability where y is a fixed randomized output value Intuitive definition: if there are many ’s that can be mapped to y by the randomizing scheme then disclosing y have gives little information about We say we amplify the probability that P[x ! y] xi P[x ! y]
Year: 2000
Publisher :
By : Moheeb Rajab
File Information: English Language/2 Page / size:152 KB
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سال :2000
ناشر :
کاری از : Moheeb Rajab
اطلاعات فایل : زبان انگلیسی / 2 صفحه / حجم :152
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