摘要：Permissioned (Private) distributed ledger technologies:more suitable for leveraging existing business relationships and regulatory frameworks.Architecture and Design:Integration points with existing environments,What is stored on一chain vs. off-chain? Public on一chain pointers to private off-chain data stores?Private ledgers that can be anchored in public blockchains?Ledger Data Format:standards for how to create the "data payload”that is written to a ledger are critical tointeroperability across Blockchain implementations.Distributed Key Management:not a solved problem, but needs to be for scalable deployment.encryption has a time to live which will eventually run out:implications on privacy and design for Immutability of records using encryption.Smart contracts are relatively immature:the contract execution environment must balance the security needs of the node with providing a richer(more error-prone) language.
