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hashfunction hashed;
usertype Message;
protocol KeyExchange(Monitor,CloudServer)
{
role Monitor
{
fresh MonitorValue : Nonce;
fresh Confirm: Message;
var CloudServerValue : Nonce;
send_1(Monitor,CloudServer,{Monitor,MonitorValue}pk(CloudServer));
recv_2(CloudServer,Monitor, {CloudServerValue,hashed(MonitorValue),
CloudServer}pk(Monitor));
send_3(Monitor,CloudServer, hashed(CloudServerValue, Confirm));
claim_Monitor1(Monitor,Niagree);
claim_Monitor2(Monitor,Nisynch);
claim_Monitor3(Monitor, Secret, MonitorValue);
claim_Monitor4(Monitor, Secret, CloudServerValue);
}
role CloudServer
{
var MonitorValue: Nonce;
var Confirm: Message;
fresh CloudServerValue: Nonce;
recv_1(Monitor,CloudServer,{Monitor,MonitorValue}pk(CloudServer));
send_2(CloudServer,Monitor, {CloudServerValue,hashed(MonitorValue),
CloudServer}pk(Monitor));
recv_3(Monitor,CloudServer, hashed(CloudServerValue, Confirm));
claim_CloudServer1(CloudServer,Niagree);
claim_CloudServer2(CloudServer,Nisynch);
claim_CloudServer3(CloudServer, Secret, MonitorValue);
claim_CloudServer4(CloudServer, Secret, CloudServerValue);
}
}