Blockchain is a shared database with excellent characteristics,such as high decentralization and traceability.However,data leakage is still a major problem for blockchain transactions.To address this issue,this work i...Blockchain is a shared database with excellent characteristics,such as high decentralization and traceability.However,data leakage is still a major problem for blockchain transactions.To address this issue,this work introduces KPH(Paillier Homomorphic Encryption with Variable k),a privacy protection strategy that updates the transaction amount using the enhanced Paillier semihomomorphic encryption algorithm and verifies the transaction using the FO commitment.Unlike the typical Paillier algorithm,theKPHscheme’s Paillier algorithm includes a variable k and combines the L function and the Chinese remainder theorem to reduce the time complexity of the algorithm from O(|n|2+e)to O(logn),making the decryption process more efficient.展开更多
基金funded by the Emerging Interdisciplinary Project of CUFE,the National Natural Science Foundation of China (No.61906220)Ministry of Education of Humanities and Social Science project (No.19YJCZH178).
文摘Blockchain is a shared database with excellent characteristics,such as high decentralization and traceability.However,data leakage is still a major problem for blockchain transactions.To address this issue,this work introduces KPH(Paillier Homomorphic Encryption with Variable k),a privacy protection strategy that updates the transaction amount using the enhanced Paillier semihomomorphic encryption algorithm and verifies the transaction using the FO commitment.Unlike the typical Paillier algorithm,theKPHscheme’s Paillier algorithm includes a variable k and combines the L function and the Chinese remainder theorem to reduce the time complexity of the algorithm from O(|n|2+e)to O(logn),making the decryption process more efficient.
