This document summarizes a research paper that analyzes the security of an image text encryption scheme based on bit-plane extraction. The paper identifies security defects in the existing scheme and proposes improved known-plaintext and chosen-plaintext attacks. It then outlines an enhanced encryption scheme that adopts statistical values from the plain image during diffusion and builds relationships between bit planes to reduce pixel correlations in the encrypted image. The proposed scheme is evaluated experimentally and compared to other methods, showing improvements in security and robustness against attacks while maintaining encrypted image quality.