11 Other Resources
The following standards are applicable to data structures in the Payments Building Block:
- The transaction data is passed in a format that is compatible with ISO 20022.
- The voucher number generation should be aligned to 18031:2011 or NIST SP 800A (Recommendation for Random Number Generation Using Deterministic Random Bit Generators), B (Recommendation for Entropy Sources used for Random Bit Generation) and C (Recommendation for Random Bit Generator (RGB) Constructions).
- Merchant IDs must conform to the Universally unique identifier (UUID).
- A Merchant Presented Mode dynamic QR code would be recommended (EMV QRCPS v1.1 2020).