| Summary: | 碩士 === 國立陽明大學 === 醫學工程研究所 === 92 === In order to promote the pervasion and application of electronic health records (EHR) and achieve medical information security requirements in hospitals and clinics, it is necessary to consider security protection. The EHR may contain medical digital images. In hospitals now, the security protection to prevent images being tampered modified unlawfully and confidential data being accessed illegally is still lacking. Therefore, establishing a secure mechanism to protect data is extremely urgent.
In this research, we aimed to develop the components of digital signature, data encryption for plugging into the existing modalities and software systems that could reach DICOM security standard and other medical information security regulations. We also implemented a solution for the intra-oral X-ray image for image integrity to identify whether the image was tampered or not.
Methods: RSA cryptography algorithm is the most popular solution used to address security problems. In this paper, we used the RSA cryptography algorithm combining with message authentication code (MAC) as the method of digital signature. We used the symmetric cryptography algorithm combined with RSA as the method of encryption. Results: Under public key infrastructure (PKI), integrating with smart card system protects the sensitive information and private keys with the personal identification number (PIN). Also, implementing the digital signatures of modality and person protects the confidentiality of long-term storage of images. Conclusion: We have developed a “skeleton” of the digital signature and encryption which apply to medical digital images, that can be used by information security manufacturers, modality manufacturers and hospitals to establish their security systemsz in the future.
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