This document summarizes a research paper on reversible data hiding in encrypted images using an optimization technique. The paper proposes an algorithm that first identifies the area of interest in an encrypted image and then uses a Bat Algorithm to find noisy pixel coordinates for embedding text data. Any remaining data is embedded in the image border areas. The research aims to securely protect embedded data against attacks while maintaining efficiency. It discusses related work on separable reversible data hiding techniques and the need for reversible data hiding in encrypted images to maintain confidentiality while allowing lossless image recovery.