TL;DR - Privacy Feature Comparison
[TODO: Quick comparison table with recommendations]
| Feature | Fabric | Besu | Corda |
|---|---|---|---|
| Primary Privacy Model | Channels + PDCs | Privacy Groups + Tessera | Point-to-Point |
| Data Visibility | Configurable per channel/collection | Configurable per privacy group | Only transaction parties |
| Ordering Service Visibility | Hash only (with PDCs) | Hash only (with Tessera) | Notary sees TX |
| Smart Contract Privacy | Per-channel chaincode | Private contracts | Per-transaction |
Introduction
[TODO: Why privacy is critical for enterprise blockchain, regulatory requirements]
Privacy Models Overview
Channel-Based Privacy (Fabric)
[TODO: Network segmentation approach]
Privacy Group Model (Besu)
[TODO: Ethereum-based private transactions]
Point-to-Point Privacy (Corda)
[TODO: Transaction-level privacy by design]
Hyperledger Fabric Privacy
Channels
[TODO: Complete network segmentation, separate ledger]
How it works:
- Separate ledger per channel
- Separate chaincode deployments
- Complete isolation of transactions
Pros:
- Complete data isolation
- Familiar network segmentation concept
- Strong privacy guarantees
Cons:
- Operational overhead for many channels
- Cross-channel communication complexity
- Static membership
Private Data Collections (PDCs)
[TODO: Subset privacy within a channel]
How it works:
- Private data stored in SideDB
- Hash committed to channel ledger
- Gossip-based distribution to authorized peers
Pros:
- Flexible, per-transaction privacy
- Lower overhead than new channels
- Dynamic access control
Cons:
- Hash still visible on ledger
- Data dissemination via gossip
- Requires careful collection design
Transient Data
[TODO: Data that never touches the ledger]
Encryption Options
[TODO: Application-level encryption on top of PDCs]
Privacy Architecture Diagram
[TODO: Visual showing channels, PDCs, data flow]
Hyperledger Besu Privacy
Tessera Integration
[TODO: External privacy manager for encrypted transactions]
How it works:
- Tessera encrypts private payloads
- Point-to-point distribution to recipients
- Privacy Marker Transaction on public chain
Pros:
- EVM compatibility maintained
- Flexible privacy groups
- Well-documented
Cons:
- Additional infrastructure (Tessera nodes)
- Privacy features deprecated path concerns
- Performance overhead
Privacy Groups
[TODO: Flexible vs legacy privacy groups]
Private Smart Contracts
[TODO: Contracts visible only to group members]
Limitations
[TODO: Private contracts can't call public, state isolation]
Privacy Architecture Diagram
[TODO: Visual showing Besu, Tessera, privacy groups]
R3 Corda Privacy
Point-to-Point Model
[TODO: Transactions only shared with parties involved]
How it works:
- No global broadcast of transactions
- Only transaction parties see data
- Notary validates but doesn't see content
Pros:
- Privacy by design
- No unnecessary data exposure
- Natural fit for bilateral agreements
Cons:
- Different programming model
- Less ecosystem tooling
- Notary trust considerations
Confidential Identities
[TODO: Anonymous transaction participants]
SGX/Confidential Computing
[TODO: Hardware-based privacy enhancements]
Privacy Architecture Diagram
[TODO: Visual showing Corda transaction flow]
Feature-by-Feature Comparison
Data Visibility
| Scenario | Fabric | Besu | Corda |
|---|---|---|---|
| All network participants | Channel members | Public state | N/A |
| Subset of participants | PDC members | Privacy group | Transaction parties |
| Ordering/Notary service | Hash (PDC) | Hash (Tessera) | Hash only |
| Historical data | Configurable TTL | Persisted | Persisted |
Consensus & Privacy
[TODO: How each platform handles consensus for private data]
Smart Contract Privacy
| Feature | Fabric | Besu | Corda |
|---|---|---|---|
| Private contract deployment | Per-channel | Per privacy group | Per-transaction |
| Private function calls | Via PDC | Via private TX | Always private |
| Cross-privacy calls | Limited | Cannot call public | N/A |
Performance Impact
[TODO: Privacy overhead for each platform]
Regulatory Compliance
[TODO: GDPR, data residency, right to be forgotten]
| Requirement | Fabric | Besu | Corda |
|---|---|---|---|
| Data deletion | PDC TTL | Limited | Limited |
| Data residency | Channel/PDC config | Tessera config | Node location |
| Audit trail | Hash on ledger | PMT on chain | Notary records |
Use Case Recommendations
Maximum Privacy Required
[TODO: Corda or Fabric with PDCs]
Recommendation: R3 Corda or Hyperledger Fabric with Private Data Collections
Use cases:
- Bilateral trade agreements
- Confidential financial transactions
- Healthcare data exchange
Ethereum Compatibility Required
[TODO: Besu with Tessera]
Recommendation: Hyperledger Besu with Tessera
Use cases:
- Tokenization with privacy
- DeFi with confidentiality
- Existing Ethereum skills
Multi-Organization Consortiums
[TODO: Fabric with channels and PDCs]
Recommendation: Hyperledger Fabric
Use cases:
- Supply chain networks
- Trade finance
- Industry consortiums
Hybrid Public/Private
[TODO: Besu for bridge to public Ethereum]
Recommendation: Hyperledger Besu
Use cases:
- Private computation, public settlement
- Tokenization with public liquidity
- Cross-chain applications
Decision Framework
Step 1: Assess Privacy Requirements
[TODO: Questions to ask about data sensitivity]
1. Who should NEVER see the data?
2. What data can be public (hashed)?
3. Do you need data deletion capability?
4. What are your regulatory requirements?
Step 2: Evaluate Technical Constraints
[TODO: Existing skills, ecosystem requirements]
1. Do you need EVM/Solidity?
2. What's your team's blockchain experience?
3. Integration requirements?
Step 3: Consider Operational Complexity
[TODO: Infrastructure, maintenance overhead]
Decision Tree
[TODO: Visual decision tree for platform selection]
Hybrid Approaches
Fabric + Public Chain Bridge
[TODO: Using Fabric for privacy, bridge to Ethereum for liquidity]
Besu Private + Public
[TODO: Same Besu network with private and public transactions]
Cross-Platform Interoperability
[TODO: Emerging solutions for cross-platform privacy]
Future Privacy Developments
Zero-Knowledge Proofs
[TODO: ZKP integration across platforms]
Confidential Computing
[TODO: SGX, SEV for hardware-based privacy]
Homomorphic Encryption
[TODO: Compute on encrypted data]
Conclusion
[TODO: Summary, no one-size-fits-all, match to requirements]
FAQ
Which platform has the strongest privacy?
[TODO: Answer - depends on threat model, Corda by design]
Can I achieve GDPR compliance?
[TODO: Answer - yes with proper architecture on any platform]
What about privacy on public blockchains?
[TODO: Answer - ZK-rollups, but different trust model]
Can I migrate between platforms?
[TODO: Answer - difficult, choose carefully upfront]
Need help choosing? ChainLaunch supports both Hyperledger Fabric and Hyperledger Besu with privacy features configured out of the box. Deploy a test network and evaluate both platforms.