Blockchain　shows　the　potential　for　various　applications,　thanks　to　its　property　of　decentralization　and　its　security.　Consensus　protocols　play　an　important　role　in　the　blockchain　system,　especially　in　the　security　of　the　blockchain　system.　Moreover,　hybrid　consensus　protocols　were　introduced　to　tackle　the　weaknesses　of　one　consensus　protocol.　Therefore,　this　paper　conducts　a　security　performances　analysis　of　the　hybrid　protocols,　starting　with　the　classification　of　mainstream　consensus　protocols,　such　as　Proof-of-Work,　Proof-of-Stake,　Delegated-Proof-of-Stake,　and　Practical-Byzantine-Fault-Tolerance.　This　survey　paper　analyzes　several　common　consensus　security　attacks　and　their　target　consensus　protocols.　Furthermore,　this　paper　presents　some　hybrid　protocol　cases　and　explains　common　problems　and　the　working　mechanism　of　hybrid　protocols.　This　paper　further　summarizes　the　security　analysis　of　each　case.　The　result　indicates　that　hybrid　protocols　can　handle　particular　security　issues　quite　well　since　hybrid　protocols　can　inherit　the　strengths　from　another　consensus　protocol　that　is　not　troubled　by　a　particular　security　attack.　Some　future　study　directions　are　highlighted　regarding　hybrid　protocol　security　performance　in　this　paper,　which　are　the　great　contribution　made　in　this　paper　and　will　be　valuable　references　for　the　related　researchers.　©　2022　IEEE.