International Journal of Innovative Science Engineering and Technology (IJISET)
Due to the improvement of the technologies the usage of the social networks in nowadays also increase. It becomes important to maintain the distributed systems in several types of communication in the social network and perform their action in online social networks. Due to the lacking of the communication the centralized authority becomes one of the important issues in the distributed system, the several number attacks have been performed in the distributed system one of the major important attack is Sybil attack. In this attack the fake information are created by attacker and try to find the information of the user.