Public key authentication searchable encryption method and system based on trusted execution environment

• Main Authors: LI LIMIN, GUO SHANQING, TANG PENG, YANG SHUFEI, LIU YONGZHI, QIN GUIYUN, HU CHENGYU
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention discloses a public key authentication searchable encryption method and system based on a trusted execution environment. The method comprises the steps of receiving a keyword ciphertext, a file ciphertext, a ciphertext of a file encryption key, a search trap door and a receiver private key; the method comprises the following steps of: verifying whether a keyword ciphertext and an encrypted ciphertext in a search trap door are encrypted by different public keys of a receiver on the same keyword and signature or not; decrypting the keyword ciphertext and searching the trap door; verifying whether the signature of the sender to the file keyword and the signature of the receiver to the search keyword are correct or not; verifying whether the decrypted file keyword is matched with the search keyword or not; and after the verification process is passed or a first verification failure result is received, verification is stopped, and the search result is sent to the receiver, so that the receiver downloa