Blockchain has become increasingly popular for data management in recent years. However, the existing blockchain systems lack efficient semantic queries, particularly keyword queries. To address this issue, we propose a learned-index-based query architecture on blockchain. First, our records semantics information to support Second, establish lookup table index among blocks and block-level recur...

This study explores the concept of a Public Key Encryption Scheme (PKES) with an emphasis on enabling keyword search functionality. The aim this research is to develop cryptographic framework that allows users securely over encrypted data without revealing sensitive information. investigates various methods and techniques employed in PKES achieve efficient privacy-preserving capabilities. highl...

In order to improve the accuracy of text keyword extraction, this paper combined with relevant methods abstract aiming extract key sentences through extraction method, and then optimize effect extraction. The experimental results show that algorithm on after is improved by 6.92 percentage points.