نتایج جستجو برای: order preserving transformation
تعداد نتایج: 1147513 فیلتر نتایج به سال:
The problem of order-preserving matching has gained attention lately. The text and the pattern consist of numbers. The task is to find all substrings in the text which have the same relative order as the pattern. The problem has applications in analysis of time series like stock market or weather data. Solutions based on the KMP and BMH algorithms have been presented earlier. We present a new s...
In this paper we study order-preserving encryption (OPE), a primitive in the database community for allowing efficient range queries on ecrypted data. OPE was suggested by Agrawal et al [1], and was throughly studied by Boldyreva et al [2]. In this paper we present a practical OPE scheme, which is a key-controlled algorithm, based on simple computation. A primary analysis shows that our algorit...
Let h be a finite dimensional complex Hilbert space, b(h)+ be the set of all positive semi-definite operators on h and Phi is a (not necessarily linear) unital map of B(H) + preserving the Entropy-Gibbs transformation. Then there exists either a unitary or an anti-unitary operator U on H such that Phi(A) = UAU* for any B(H) +. Thermodynamics, a branch of physics that is concerned with the study...
Privacy preserving is one of the most important research topics in the data security field and it has become a serious concern in the secure transformation of personal data in recent years. For example, different credit card companies and disease control centers may try to build better data sharing or publishing models for privacy protection through privacy preserving data mining techniques (PP...
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