Tomohiro Sekino

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—Recently, Radio Frequency IDentification (RFID) systems are intensively studied and widely used in everyday applications, such as, retailing, supply chain management, and medical equipment management. Tags in RFID systems are highly efficient to be managed and tracked, but at the same time suffering from impersonation and privacy problems. Consequently ,(More)
—Explosive progress in networking and outsourcing storage increases the use of information retrieval technologies, in massive datasets. Nowadays, there are varieties of storage-providers through the internet, such as e-mail accounts and public database, which are convenient to store and exchange electronic files and medias. Typically, the storage-provider(More)
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