Medical images exchanged over vulnerable networks are sensitive to modifications or tampering which could lead to misdiagnosis, risking the lives of the patients. Therefore, to provide safe and secure transmission of medical images, key security requirements such as authenticity, integrity, and confidentiality must be addressed. In this paper, a novel and efficient algorithm is proposed which provides security services for transmitted medical images in tele-medicine applications. The proposed algorithm employs joint encryption/watermarking procedures to provide the required security services, as well as to provide control access privileges at the receiving side. The algorithm is based on reversible data hiding principles that guarantee the extraction of the hidden data while restoring the original image unaffected. The embedded data is basically two watermarks; a spatial domain watermark and an encrypted domain watermark. The dual watermarks allow the authenticity and integrity of the transmitted medical images to be verified in the spatial and encrypted domains. The proposed algorithm has been extensively evaluated using three performance metrics; embedding capacity, visual image quality, and entropy. The ability of the algorithm to fulfill the security, reversibility, and separability requirements has been validated.

通过易受攻击的网络交换的医学图像对修改或篡改很敏感，这可能导致误诊，并危及患者生命。因此，为了提供安全可靠的医学图像传输，必须解决关键的安全性要求，例如真实性，完整性和机密性。本文提出了一种新颖高效的算法，为远程医疗应用中传输的医学图像提供安全服务。所提出的算法采用联合加密/水印过程来提供所需的安全服务，并在接收方提供控制访问特权。该算法基于可逆数据隐藏原理，该原理可确保在恢复原始图像不受影响的同时提取隐藏数据。嵌入的数据基本上是两个水印。空间域水印和加密域水印。双重水印允许在空间和加密域中验证传输的医学图像的真实性和完整性。所提出的算法已使用三个性能指标进行了广泛的评估。嵌入能力，视觉图像质量和熵。该算法满足安全性，可逆性和可分离性要求的能力已得到验证。视觉图像质量和熵。该算法满足安全性，可逆性和可分离性要求的能力已得到验证。视觉图像质量和熵。该算法满足安全性，可逆性和可分离性要求的能力已得到验证。