R3 Ltd.

Qurratul Ain Shams Asari

Michael Christopher Hearn

Richard Gendal Brown

Roy Hopkins

Christopher Michael Hearn

A method and system are provided to support a decentralized distributed ledger in which transactions are recorded by parties to the transactions without the use of a blockchain. A distributed ledger system provides a protocol framework that supports the development of protocol flows. A protocol flow is computer code that controls the performance of a transaction by the party or parties to the transaction. Protocol flows can be developed for different types of transactions. The distributed ledger system allows transactions to be proposed, accepted, and notarized by a notary and stored without the use of a blockchain ledger. The distributed ledger system can avoid the expense of the computational and storage resources needed to redundantly verify a transaction and store evidence on the many nodes of a blockchain distributed ledger.

Protocol flow for notarizing a transaction

A secure enclave is hosted by an untrusted host. To securely persist data on the untrusted host, the secure enclave generates or updates a persistent file system, wherein the persistent file system is a collection of logical files. The secure enclave segments the persistent file system into a plurality of sectors. The secure enclave provides a key specification to a key derivation enclave. The secure enclave obtains an encryption key dynamically generated based on the key specification. The secure enclave cryptographically protects each of the plurality of sectors using the key and causes the host to write a plurality of encrypted sectors to a disk as a single physical file.

Persistent file system in a secure enclave

Protocol framework for supporting protocol flows

Deterministic java virtual machine

Protocol flow for proposing a transaction

Composite keys for authorization policies

Secure processing of electronic transactions by a decentralized, distributed ledger system

Growing community of inventors

London, United Kingdom

Qurratul Ain Shams Asari