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It becomes utmost important that the patient confidentiality is ensured while medical data is being sent over the public networks as well as when it is stored in the healthcare repository used by a remote monitoring system. ECG monitoring facilitates in providing accelerated health status of the concerned patient to the healthcare centre in case of the hostile cardiac behaviour. Transmission of this compressed ECG via a communication channel introduces various security and privacy issues [5]. To counteract with these concerns, there is a need for implementation of efficient security protocols. To this effect, several algorithms have been developed in the past two to three decades. The patient’s confidential data hiding through watermarking and the ECG encryption techniques are the emerging biometric security mechanisms. This paper attempts to explore the state of the are approaches developed for ECG encryption and steganography.
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