DATA DEDUPLICATION AND ENHANCED CLOUD SECURITY USING SEARCHABLE ENCRYPTION

In this paper, we describe our cryptographic method for the problem of searching on encrypted data and provide maximu security for the resulting crypto systems. Our technique have a number of crucial advantages. They are provably secure: they provide provable security for encryption, in the sense that the untrusted server cannot know anything about the text when only given the cipher-text; they provide query isolation for search, meaning that the untrusted servers cannot learn anything more about the plaintext than the search result; they provide controlled searching, so that the untrusted server cannot search for an arbitrary word without the user’s authorization; they also support hidden queries, so the user may ask the untrusted servers to search for a secret word without knowing to the server . The algorithm we present are simple, fast and introduce almost no space and hence are practical to use today.