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Merge pull request #11927 from iamaliyousefi/update-multiparty-comput…
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[ContainersARB] Update Multiparty computing architecture design
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prmerger-automator[bot] authored Jul 2, 2024
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Expand Up @@ -26,9 +26,9 @@ Another possibility for multiparty computing uses hardware protected memory on t

Since secure enclaves have the capability to remotely attest themselves to other enclaves, you can design a multiple organization network where the system runs from the enclaves. This approach is called the *trusted execution environment*.

Azure offers a managed service called Azure Confidential Ledger that lets you run a blockchain model on secure enclaves.
[Azure Confidential Ledger](/azure/confidential-ledger/overview) is an Azure-managed service that allows you to run blockchain models on secure enclaves.

Finally, you could choose a centralized system, which offers immutability and trustworthiness. Azure SQL Database ledger offers the trust needed for multiparty computing in a relational database. You may not need a decentralized consensus, but just the immutability aspect of the ledger.
Finally, you could choose a centralized system, which offers immutability and trustworthiness. [Azure SQL Database ledger](/azure/azure-sql/database/ledger-overview) offers the trust needed for multiparty computing in a relational database. You might not need a decentralized consensus, but just the immutability aspect of the ledger.

## Blockchain network models

Expand Down Expand Up @@ -61,7 +61,7 @@ There are deployment templates available on Azure for most blockchain ledgers fo

### Blockchain on Kubernetes

Since most blockchain ledgers support deploying into Docker containers, you can use Kubernetes to manage the containers. Azure has a managed Kubernetes offering called Azure Kubernetes Service (AKS) that you can use to deploy and configure your blockchain nodes.
Since most blockchain ledgers support deploying into containers, you can use Kubernetes to manage the containers. Azure Kubernetes Service (AKS) is an Azure-managed Kubernetes service that you can use to deploy and configure your blockchain nodes.

AKS implementations come with a managed service for the virtual machines that power the AKS cluster. However, your organization must still manage your AKS clusters and any networking or storage options in your architecture.

Expand All @@ -71,13 +71,13 @@ There are deployment templates available on Azure for most blockchain ledgers fo

Azure supports third-party services that run ledger software on Azure. The service provider manages the infrastructure. They handle maintenance and updates. High availability and consortium management are included in the service.

ConsenSys offers Quorum on Azure. Quorum is an open-source protocol layer that supports Ethereum-based applications.
[ConsenSys](https://consensys.io/) offers Quorum on Azure. Quorum is an open-source protocol layer that supports Ethereum-based applications.

There may be other offerings in the future.

### Azure Confidential Ledger

Azure Confidential Ledger is a managed service built on the Confidential Consortium Framework. It implements a permissioned blockchain network of nodes within Azure confidential computing. Confidential Ledger builds on existing encryption.
[Azure Confidential Ledger](/azure/confidential-ledger/overview) is a managed service built on the Confidential Consortium Framework. It implements a permissioned blockchain network of nodes within Azure confidential computing. Confidential Ledger builds on existing encryption.

- Existing encryption
- **Data at rest.** Encrypt inactive data when stored in blob storage or a database.
Expand All @@ -91,12 +91,10 @@ Data stored in Confidential Ledger is immutable and tamper-proof in the append-o

### Azure SQL Database ledger

Azure SQL Database ledger allows participants to verify the data integrity of centrally-housed data without the network consensus of a blockchain network. For some centralized solutions trust is important, but decentralized infrastructure isn't necessary. This approach avoids complexity and performance implications of such an infrastructure.
[Azure SQL Database ledger](/azure/azure-sql/database/ledger-overview) allows participants to verify the data integrity of centrally-housed data without the network consensus of a blockchain network. For some centralized solutions trust is important, but decentralized infrastructure isn't necessary. This approach avoids complexity and performance implications of such an infrastructure.

![Diagram shows database ledger architecture.](images/database-ledger.png)

> [!NOTE]
> Azure SQL Database ledger is currently in public preview.

Ledger provides tamper-evidence capabilities for your database. These capabilities allow you to cryptographically attest that your data hasn't been tampered with.

Expand Down Expand Up @@ -154,4 +152,4 @@ This diagram summarizes options for the multiparty computing with Azure services
- [Blockchain workflow application](https://azure.microsoft.com/updates/action-required-migrate-your-azure-blockchain-service-data-by-10-september-2021)
- [Decentralized trust between banks](../../example-scenario/apps/decentralized-trust.yml)
- [Authenticating Azure confidential ledger nodes](/azure/confidential-ledger/authenticate-ledger-nodes)
- [Azure Confidential Ledger Architecture](/azure/confidential-ledger/architecture)
- [Azure Confidential Ledger Architecture](/azure/confidential-ledger/architecture)

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