How Can a Reputation System Be Designed to Be Resistant to Sybil Attacks?
A reputation system can be designed to be resistant to Sybil attacks by making it costly to create new identities. This can be done by requiring users to solve a computational puzzle, pay a fee, or provide some form of real-world identification.
Another approach is to use a social trust graph, where users are vouched for by other trusted users. This makes it difficult for an attacker to create a large number of fake identities that are trusted by the system.
