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

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.,...

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Bibliographic Details
Published in:IEEE transactions on information technology in biomedicine Vol. 16; no. 5; pp. 891 - 899
Main Authors: Bouslimi, D., Coatrieux, G., Cozic, M., Roux, C.
Format: Journal Article
Language:English
Published: United States IEEE 01.09.2012
Institute of Electrical and Electronics Engineers
Subjects:
Algorithms
Biomedical imaging
Block cipher
Computer Security
Databases, Factual
Diagnostic Imaging - methods
Electronic Health Records
Encryption
Humans
Image Processing, Computer-Assisted - methods
Joints
medical image security
quantization index modulation (QIM)
Reliability
Reproducibility of Results
stream cipher
Watermarking
Block Cipher
Watermarking
Stream Cipher
Encryption
Quantization Index modulation
Security
Medical Image
ISSN:1089-7771, 1558-0032, 1558-0032
Online Access:Get full text
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Summary: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.
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ISSN:1089-7771
1558-0032
1558-0032
DOI:10.1109/TITB.2012.2207730