Product : The Linux Foundation, Hyperledger Fabric/1.1, All
Feature : Security model, Security, Architecture
Content Owner:  MLG Blockchain
Summary
Membership Service Provider - pluggable interface that supports customizable credential architectures and certificate authorities

Concrete identity format
User credential validation
User credential revocation
Signature generation and verification
Details
For more information:

http://hyperledgerdocs.readthedocs.io/en/latest/security_model.html