Registered Keyword Searchable Encryption Based on SM9

The SM9 algorithm is an Identity-Based Encryption (IBE) independently made by China. existing searchable encryption scheme cannot be effective against insider keyword guessing attacks and violates users’ data privacy. This article utilizes the method to propose a Registered Public Keyword Searchable based on (RKSE-SM9), which uses user keys in registration algorithm. For RKSE-SM9 generate ciphertext or trapdoor, secure server must first register keyword, effectively reasonably protects resists honest curious cloud servers. From there, we also utilize Beaver’s triple construct improved registered generation algorithm, defining proving that satisfies concept of indistinguishability keywords, achieving higher level In addition, compared with encryption, our proved guarantee better security while reducing computational efficiency only 1%; scheme, overall operational increases 63%.