MSP is the trusted authority that has the power to issue, govern, or

revoke the certificates of all the actors in the Fabric Blockchain

network. By default, it uses the X.509 certificates for identity.

Because Fabric is a permissioned DLT, the importance of such a

service is paramount. In Fabric, the MSPs can be configured in two

different domains, i.e., local MSP and channel MSP. While the local

MSP sets the MSP the right levels of peers and orderers; the

channel MSP does the same for the channels.

13.1.4 Policies

Policies are a set of rules that determine which organization has

access to what resources. Policies can be implemented in the

system channel (primary channel) level or application level or smart

contract and access control level. Policies make sure of the access

by matching the signature associates with each identity in the

transactions.

13.1.5 Peers

The Fabric Blockchain constitutes of a number of peer nodes which

are generally referred to as peers, as illustrated in Figure 13.2. Each

organization can have one or more peers that can host the ledgers

and smart contracts. Refer to Figure 13.2, as follows: