The document discusses a research paper on secure data sharing in cloud computing. It summarizes that the paper by Wei et al. proposed a revocable-storage identity-based encryption (RS-IBE) scheme to support secure and efficient data sharing in cloud computing. However, the document notes that Wei et al.'s RS-IBE scheme does not satisfy the correctness property of an RS-IBE scheme. It then states that a method is proposed to modify the existing RS-IBE scheme to address this issue.