How Does a ‘Permissioned Blockchain’ Differ in Sybil Resistance?

A permissioned blockchain is a private network where participants must be approved and granted access by a central authority or consortium. Sybil resistance is achieved not through economic or computational cost, but through this centralized identity verification process.

Since all participants are known and vetted, the creation of numerous fake identities (Sybil attack) is prevented by the governance layer, making the consensus mechanism simpler and faster.