Product : The Linux Foundation, Hyperledger/1.0.4, Sawtooth Lake
Feature : Privacy, Security, Architecture
Content Owner:  MLG Blockchain
Configrable permissions for any node cluster within the network
Sawtooth is built to solve the challenges of permissioned (private) networks. Clusters of Sawtooth nodes can be easily deployed with separate permissioning. There is no centralized service that could potentially leak transaction patterns or other confidential information. There is no concept of private channels as seen with Hyperledger fabric

contributors are investigating both trusted execution and zero-knowledge cryptographic approaches