Comparison of CBDCs by Technology Type: Blockchain-based CBDCs and Non-Blockchain Digital Currencies

Comparison of CBDCs by Technology Type:

Central bank digital currencies (CBDCs) are emerging as a key element that will define the future of digital currencies. Governments and central banks around the world are focusing on developing CBDCs to modernize their monetary systems and increase efficiency and transparency. However, the technical basis of CBDCs can be divided into

blockchain-based

and

non-blockchain digital currencies

, and these two approaches have significant differences in design and operation. In this article, we will compare the characteristics and pros and cons of the two technologies to examine the suitability and potential of each technology.

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Blockchain-based CBDC

1. What is a blockchain-based CBDC?

Blockchain, or distributed ledger technology (DLT), is the technology that underpins cryptocurrency systems such as Bitcoin and Ethereum. In the case of CBDC, blockchain-based implementations leverage decentralized and immutable properties, but unlike public blockchains, it is common to use

private or consortium blockchains where transactions are verified by a central bank or authorized entity.

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2. Main Features

• Decentralization : Transaction records are distributed across multiple nodes to prevent a single point of failure.
• Transparency : All transactions are recorded in a ledger, promoting trust and accountability.
• Security : Data is protected through encryption technology, reducing the risk of fraud or unauthorized access.
• Programmable features : Supports transactions that are automatically executed according to conditions through smart contracts, making it easy to introduce new financial policies.

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3. Use Cases

Blockchain-based CBDCs are suitable for:

• Cross-border payments : Simplify, reduce costs, and speed up international transactions by eliminating intermediaries.
• Financial Inclusion : Provide digital economy accessibility to the unbanked population through blockchain wallets.
• Anti-Money Laundering (AML) : Blockchain’s traceability helps regulators monitor illicit activity.

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4. Challenges

Blockchain-based CBDCs have the following limitations:

• Scalability issues : Current blockchain systems have limitations in handling large transactions supporting national currencies.
• Energy consumption : Although private blockchains consume less energy than public blockchains, they still require significant computational resources.
• Regulatory Issues : The transparency of blockchain can raise privacy concerns for users and can also make regulatory compliance difficult.

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Non-blockchain digital currency

1. What is non-blockchain digital currency?

Non-blockchain digital currencies utilize traditional centralized databases and payment systems rather than distributed ledgers. These systems prioritize performance and simplicity, and are characterized by direct control and management by a central authority.

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2. Main Features

• Centralized control : The transaction ledger is managed and updated by a single authority, such as a central bank.
• High Performance : Designed to handle high volumes of transactions, it delivers fast and reliable performance.
• Simplicity : It is simpler to implement than blockchain because it uses existing technology stacks and infrastructure.

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3. Use Cases

Non-blockchain digital currencies are suitable for:

• Domestic Payments : Designed to handle large, real-time transactions in domestic transactions.
• Integration with existing systems : Easier integration with traditional banking and financial networks.
• Privacy Protection : Centralized systems can be designed to balance user privacy and regulatory compliance.

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4. Challenges

Non-blockchain approaches also have limitations:

• Single point of failure : Centralized systems are vulnerable to cyberattacks and technical failures.
• Trust reliance : Users must trust that the central authority will operate the system fairly and transparently.
• Limited innovation : Compared to blockchain, the development of advanced features such as smart contracts is limited.

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Comparative Analysis

Element Blockchain-based CBDC Non-blockchain digital currency

Control method	Decentralization (private/consortium chain)	Centralization
Performance	Normal (scalability issues exist)	Excellent (optimized for speed and large-scale processing)
Transparency	High (Ledger disclosed to participants)	Usually (depending on design method)
Security	Strong (utilizes encryption and distributed nodes)	Moderate (single point of failure risk)
Potential for innovation	High (supports programmable smart contracts)	Limited

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conclusion

The choice of technology for CBDC depends on the goals and priorities of each central bank. Blockchain excels in transparency, security, and innovation, and is suitable for cross-border payments and increasing financial inclusion. On the other hand, non-blockchain digital currencies emphasize high performance and simplicity, and are suitable for domestic payment systems.As CBDCs have a growing impact on the global economy, hybrid models that combine blockchain-based and non-blockchain technologies are likely to emerge. Ultimately, a successful CBDC will need to be designed with a balanced mix of efficiency, security, privacy, and inclusion.

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4o