What is BNB Attestation Service (BAS)?

Deep Dive

1. Purpose & Value Proposition

BAS addresses two critical Web3 gaps:
- Authenticity: Provides a standardized protocol for verifying credentials (KYC, asset ownership, on-chain behavior) through cryptographic attestations
- Ownership: Stores off-chain attestations in BNB Greenfield, letting users control access permissions via encryption

This enables use cases like permissioned DeFi pools, compliant token launches, and reputation-based governance – critical for institutional adoption.

2. Technology & Architecture

The stack includes three modular components:
- BNB Passport: Aggregates KYC data from Binance and partner exchanges via Space ID integration
- Attestation Registry: On-chain repository of structured proofs (e.g., wallet balances, transaction history)
- BAS SDK: Plug-and-play tools for dApps to verify credentials without handling raw data

Off-chain attestations use zk-SNARKs for privacy and are stored on Greenfield, while on-chain versions enable real-time verification.

3. Key Differentiators

• BNB Chain Integration: Native compatibility with BSC’s 2,300+ dApps and 1.4M daily transactions
• Regulatory Alignment: Binance’s existing KYC infrastructure flows into BNB Passport, easing compliance
• Data Portability: Users can selectively share Greenfield-stored attestations across chains via SDK

Conclusion

BAS positions itself as Web3’s trust layer – transforming unstructured data into verifiable, user-owned assets while serving BNB Chain’s scalability needs. How quickly will developers adopt its SDK to build compliant DeFi/RWA applications?