Introduction
In light of existing challenges in digital currency technology, this invention proposes a digital currency system to address at least one of the prevailing issues. The system enhances security, convenience, and applicability for real-world transactions while ensuring compliance with regulatory standards.
Technical Framework
The digital currency system comprises:
Central Bank Digital Currency System:
- Generates and issues digital currency.
- Manages ownership registration.
- Records transaction history.
Commercial Bank Digital Currency System:
- Executes banking functions (e.g., deposits, withdrawals).
- Connects with adapters like transaction data systems, SMS gateways, and retailer interfaces.
Authentication System:
- Verifies interactions between the central bank, users, and commercial banks.
- Ensures secure transactions via Identity-Based Cryptography (IBC) or PKI.
Key Features:
Currency Generation:
- Created in fixed denominations (e.g., ¥1, ¥50, ¥100) or customized amounts.
- Uses cryptographic algorithms for security (e.g., hash-based encryption with random serial numbers).
Transaction Flow:
- Issuance: Central bank distributes currency to commercial banks.
- Circulation: Users withdraw digital currency via banking apps or cards.
- Offline Payments: Supports NFC-based transactions without real-time network connectivity.
Security:
- Ownership Tracking: Each unit is tied to a wallet address (e.g., derived from phone numbers or card IDs) to prevent double-spending.
- Offline Verification: Post-transaction checks validate legitimacy.
Operational Scenarios
1. Currency Withdrawal
- From Bank Account: Users transfer funds from their accounts to digital wallets.
- Cash Conversion: Physical cash is exchanged for digital currency at ATMs/branches.
2. Online Payments
- P2P Transfers: Users send digital currency via mobile apps (e.g., entering recipient’s phone number).
- Merchant Payments: POS systems validate transactions in real-time.
3. Offline Payments
- NFC Transactions: Cards or phones exchange currency without internet (verified later).
- Non-Registered Users: Recipients provide a PIN for future verification.
4. Deposits & Redemption
- Bank Deposits: Digital currency is converted back to fiat in user accounts.
- ATM Redemption: Users withdraw cash using one-time codes generated by the system.
Advantages
Convenience:
- Compatible with multiple devices (phones, cards).
- Supports both online/offline transactions.
Security:
- Encrypted currency units prevent counterfeiting.
- Ownership logs deter fraud.
Scalability:
- Integrates with existing banking infrastructure.
- Facilitates小额支付 (small-value payments) and large-scale transactions.
👉 Explore secure digital currency solutions
FAQs
Q1: How is digital currency different from mobile payment apps like Alipay?
A1: Digital currency is sovereign-backed and operates independently of bank accounts, whereas mobile apps rely on linked accounts.
Q2: Can digital currency be used internationally?
A2: Currently designed for domestic use, but cross-border functionality may be explored in future iterations.
Q3: What happens if my phone is lost or stolen?
A3: Funds remain secure as they’re tied to authenticated wallets; recovery requires identity verification.
Q4: Are transactions anonymous?
A4: Designed for "controlled anonymity"—transaction details are private but traceable by authorized entities.
Q5: How does offline payment verification work?
A5: Transactions are logged locally and synced with the central system once connectivity is restored.
👉 Learn more about digital currency security
This system paves the way for widespread adoption of digital currency, combining innovation with robust security. For implementation details, refer to the full technical documentation.