ENCRYPTION METHOD FOR SUPPORTING EQUALITY QUERY IN MULTI-CLIENT ENVIRONMENT AND APPARATUS USING THE SAME

摘要

Disclosed are an encryption method and apparatus for supporting an equivalent query for ciphertexts in a multi-client environment. According to one embodiment of the present invention, the method comprises the steps of: obtaining a user encryption key from a key generating device; and generating a ciphertext for an attribute vector based on a label for the attribute vector and the user encryption key.