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The deficiencies found in conventional paper-based patient records, practiced in healthcare service provision, have resulted in the emerging development of electronic patient record (EPR) systems. This paper proposes a cryptography-based EPR security model guaranteeing the patient's record integrity, accountability, confidentiality and patient record access(More)
We propose a digital signature scheme for dynamic coalitions. Particularly, we enable members to join and leave. Our scheme does not need trusted or oblivious third parties (TTPs or OTPs). In this distributed scheme there is a changing secret group key dependent on the members in the group. Each member’s secret key remains the same for all group(More)
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