- What is the general idea of a sybil attack?
General idea of a sybil attack is subversion of the network service reputation system by creating multiple identities and using them to gain a disproportionately large influence.
- What deficiencies within a system (such as a cryptocurrency network) can allow a sybil attack to occur?
„A reputation system’s vulnerability to a Sybil attack depends on how cheaply identities can be generated, the degree to which the reputation system accepts inputs from entities that do not have a chain of trust linking them to a trusted entity, and whether the reputation system treats all entities identically. „ In regards to cryptocurrencies, sybil attack is a security threat if somebody runs multiple nodes on a blockchain network.