Abstract:

The medical imagery is a transverse activity for all medical disciplines. His remarkable development is due to the large use of telecommunications and information technologies in the medicine domain. However, since the telemedicine is a medical act that must answer to stern rules, and following the easiness that is offered by the informatics sciences to violate the confidentiality and authenticity of medical data, the medical community is, actually, in state of opposition facing the computerization of data. To resolve this problem, a lot of methods combining compression and encryption have been developed in the literature to secure the transmission and the storage of medical images. This work presents a method of a partial or selective encryption for medical Images. It is based on the integration of the encryption in a compression process based on the Discrete Cosine Transform (DCT) in order to reduce the processing time in the encryption-decryption operation. The results of several experiments show that the proposed scheme rapid, efficient, secure and it perfectly preserves the performances of the new scheme.