The public key encryption with keyword search (PEKS) scheme is a cryptographic primitive that allows a cloud server to search for a ciphertext without knowing the corresponding keyword used in the search. An expressive PEKS scheme is a variant of the PEKS scheme that supports conjunctive and disjunctive searches (expressive search). Utilising the expressive properties of an attribute-... https://www.marcelovicente.com/product-category/ultra-defining-gel/