In the context of intellectual property (IP) protection, achieving synergy among fuzzy search support, dynamic access control, and high efficiency remains a significant challenge in searchable encryption research. This paper proposes SSE-Sim, a novel scheme that integrates SimHash fingerprinting with symmetric searchable encryption (SSE), enabling fast and fuzzy keyword search without revealing plaintext content. Additionally, the scheme incorporates proxy re-encryption (PRE) technology, allowing a semi-trusted proxy to re-encrypt ciphertext after authorization, thereby supporting flexible access control. Theoretical analysis demonstrates that the proposed scheme ensures confidentiality, search accuracy, and resistance to collusion attacks. Experimental results show that the scheme outperforms existing methods in terms of retrieval precision, query efficiency, and system scalability, making it well-suited for practical large-data-volume IP transaction scenarios such as patent databases and digital content platforms.