Comment on "Multi-Keyword Searchable and Verifiable Attribute-Based Encryption Over Cloud Data"

In recent article Zhang, et al. 2023, the authors presented an efficient and verifiable multi-keyword attribute-based search scheme over cloud data. In this comment, we show that the key equation design in their scheme has errors, leading to the inability to perform effective searches in the case of multi-keyword. Then we propose a correction to address this issue without compromising the original scheme's security.