Azure Confidential Ledger ACL
Overview
Azure Confidential Ledger is a managed service built on the Confidential Consortium Framework (CCF), an open-source platform developed by Microsoft Research. It provides a tamper-proof, append-only ledger backed by hardware-based trusted execution environments (TEEs / secure enclaves). Data is processed inside Intel SGX enclaves, ensuring that even Azure operators cannot access the ledger contents.
Key Strengths
- Hardware-level confidentiality — data processed inside Intel SGX enclaves, invisible to cloud operators
- Tamper-evident and append-only — cryptographic receipts prove data has not been altered
- Built on CCF (open-source) — not locked into a proprietary black box
- Azure AD integration for identity and access management
- Sub-second transaction latency with strong consistency guarantees
- Suitable for regulatory environments requiring provable data integrity
Cost
Azure Confidential Ledger is priced at approximately $0.126/ledger-hour (~$3/day or ~$91/month per ledger instance). Storage costs are additional based on volume. This makes it one of the more affordable managed blockchain/ledger services for organizations that need tamper-proof record keeping without running a full blockchain network.
Use Cases
- Storing sensitive business records requiring tamper-proof audit trails
- Financial transaction logging with regulatory compliance requirements
- Multi-party data sharing where no single party should be fully trusted
- Secure credential and secret storage with verifiable integrity
- Government and public sector record keeping
Technical Details
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