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Mobile could computing (MCC) is the availability of cloud computing services in the mobile ecosystem. MCC integrates the cloud computing into the mobile environment and has been introduced to be a potential technology for mobile devices. Although mobile devices brought us lots of convenience, it is still difficult or impossible to perform some expensive tasks due to the limited resources such as computing...
Order Preserving Encryption (OPE) is widely used for data searching. But, when all the numbers in the domain are encrypted by using OPE, an attacker can easily obtain the correspondence between encrypted numbers and original numbers. Furukawa proposed a new encryption scheme, which is called request-based comparable encryption, to solve the problem. However, comparable encryption only applies to single...
In this paper, we present an efficient request-based comparable encryption, which is based on sliding window techniques. Recently, Furukawa (Computer security-ESORICS 2013, Springer, 129–146, 2013) introduced a new primitive called request-based comparable encryption (comparable encryption for short) which overcomes the problem that OPEs cannot solve. OPEs have the problem that when all the numbers...
Privacy-preserving comparisons over encrypted database is a hot topic in the current academic research. Recently, Furukawa [7] introduced a new primitive called request-based comparable encryption (comparable encryption for short) to achieve this target. Howver, one disadvantage of comparable encryption is that huge of the token and cipher text are required in the scheme and thus the computation and...
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