Blockchain-Based Searchable Asymmetric Encryption Scheme in Cloud Environment

Searchable Symmetric Encryption is used in encrypted databases for precise queries. The most brutal attack has demonstrated that facilitating forward privacy is a critical security goal. Asymmetric searchable encryption enables searches carried out over ciphertexts via delegation and trapdoors by the data owner. Asymmetric Searchable Encryption introduces in this work for a blockchain-based keyword search system. It allows decentralized storage searches using an authorized keyword set. The ASE has based on a unique primitive that guarantees keyword authorization and searches. Explore the possibilities of Ethereum’s smart contracts, the blockchain technology that provides a different pattern for reliability with effective processing. Locating encrypted cloud services was among the most frequent issues. This paper creates a novel public-key encryption that searches on the blockchain system that uses asymmetric key encryption to accomplish protected and well-organized keyword searches. The smart contract replaces the central search cloud server in AKE (Asymmetric Key Encryption), making it a searchable distributed public encryption scheme. It has a high search efficiency while reducing the number of computation-intensive operations.