Hi David,

• • The Upenn team solution is based on a trusted third party actor that will operate between two (or more) ledgers.
• They are working on definingto define a “State of Proof” mechanism to proofprove that a certain Smart Contract is in a certain state (using hashes that are connected to the structure of the blockchain – theyblockchain). They provided ana high level overview here)here.
• They are focusing on Quorum and Fabric. On Fabric, weWe are having a call on Fabric this afternoon to help them to ramp up on the tech stack.
• There are some open questions on how this technique will impact on transaction confidentiality, and which level of visibility this trusted party needs to have.
• Roadmap here.