Abstract
Nowadays, numerous encryption schemes have been proposed in response to the growing concerns regarding the security of individuals’ health information in medical imaging. It is well known that in real-world hospital scenarios, medical equipment generates a batch of images at one time, and doctors utilize them to diagnose patients’ health conditions. Existing schemes have primarily focused on encrypting a single image; however, the lack of design for encrypting batch images leads to low flexibility in practical applications. To address this practical challenge, we propose a batch medical image encryption scheme. This scheme considers all the pixels in the batch images as a three-dimensional pixel cube and encrypts them using a Latin cube-based simultaneous permutation and diffusion technique to improve encryption efficiency. Through experimental results and security analysis, our scheme demonstrates strong key sensitivity and effectively resist various cryptographic attacks, such as brute-force attack, statistical attacks, and differential attack.