Identity in Hyperledger Fabric (Part 1)
Identity is an important feature of permissioned blockchain platform. In Hyperledger Fabric, each component needs to be identified before accessing the fabric network. The identity is represented by an X.509 digital certificate. When interacting with a fabric network, the actor specifies and presents the digital certificate, and the fabric network accepts or denies based on the policy.
There is a good description about identity in Hyperledger Fabric. Here is the link.