Research On Secure Searchable Encryption Scheme Supporting Wildcard Search

The development of Internet promotes the maturity and application of cloud computing technology.Cloud computing technology has gradually become an important way for people to manage and store data.The user outsources a large amount of data to a third-party cloud server for calculation,which greatly improves the efficiency of the operation.While providing convenience,cloud computing also brings many technical problems and challenges,among which security is the most prominent one.After the user outsources the data to the cloud server,the cloud server may learn some user data information,and the user loses the security protection capability for the data.In the cloud computing environment,searchable encryption technology allows users to store their encrypted data on the cloud server.It also maintains the ability to search a keyword over encrypted data.In practice,security is still the most important performance of searchable encryption,without leaking information about user data and search conditions.Recent research show that there have been some attacks that may use the information leakage of search results to explore the plaintext information of some users.While ensuring user data security,searchable encryption can support multiple functions of queries.In practice,searchable encryption schemes that support wildcard search are widely used.The wildcard search can satisfy the user's query requirements for fuzzy keywords,and can search for uncertain keyword information through wildcards,making the searchable encryption technology more practical.This paper proposes a searchable encryption scheme that supports the wildcard search,which hides the result pattern.We use hidden vector encryption technology and Bloom filter two traditional cryptographic primitives to construct a symmetric searchable encryption scheme.We use a hidden vector encryption in a lightweight symmetric key environment to ensure the security of search results.Also build a bloom filter index for each keyword,where a wildcard can represent multiple characters,making the scheme more secure and efficient.