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A novel secure data exchange protocol for P2PDSS in public health domain using pairing-based cryptography and data exchange policy between peers. In P2P e-Health data sharing scenarios, peers may need to exchange highly confidential data among them. Hence, there are some security threats that need to be considered using the protocol, any two peers that need to exchange data over an insecure medium can generate on-the-fly a secret session key by exchanging some system and session parameters. An important feature of the proposed protocol is that peers always generate a new session key for every new data exchange session; therefore, every session is completely independent with respect to the session key generation.
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