A Joint Encryption/Watermarking System for Verifying the Reliability of Medical Images

Abstract

In this paper, we propose a joint encryption/water-marking system for the purpose of protecting medical images. This system is based on an approach which combines a substitutive watermarking algorithm, the quantization index modulation, with an encryption algorithm: a stream cipher algorithm (e.g., the RC4) or a block cipher algorithm (e.g., the AES in cipher block chaining (CBC) mode of operation). Our objective is to give access to the outcomes of the image integrity and of its origin even though the image is stored encrypted. If watermarking and encryption are conducted jointly at the protection stage, watermark extraction and decryption can be applied independently. The security analysis of our scheme and experimental results achieved on 8-bit depth ultrasound images as well as on 16-bit encoded positron emission tomography images demonstrate the capability of our system to securely make available security attributes in both spatial and encrypted domains while minimizing image distortion. Furthermore, by making use of the AES block cipher in CBC mode, the proposed system is compliant with or transparent to the DICOM standard.

New Watermarking/Encryption Method for Medical Imaging FULL Protection in m-Health

“…Table 3 shows the comparaison of the proposed method and others method in term of availability, reliability, and confidentiality. therefore, the proposed is more secured than [6] and [16]- [20]. …”

“…where and −1 are, respectively, the semi restituted block and the function of extraction which is given in equation (6). In the first iteration the return string is initialized by the first DCT block coefficient of image to be watermarked.…”

“…Ekta Walia et al [20] where the authors have proposed a fragile and blind watermarking technique. Bouslimi et al [6] where the authors have proposed a joint encryption/watermarking system. Table 3 shows the comparaison of the proposed method and others method in term of availability, reliability, and confidentiality.…”

“…Dalel Bouslimi et al [6] have proposed a combined encryption watermarking system. Hitendra Suryavanshi et al [7] have proposed a digital image watermarking method using the wavelet transform.…”

Hybrid Baker Map With Aes in Cipher Block Chaining Mode in Medical Images

“…Information with authenticity code is embedded in both spatial domain and encrypted domain in the original input image 9 . This authenticity code is used to identify the image origin and an integrity proof.…”