CBDC explained: how digital money issued by central banks works

Introduction

The global financial landscape is currently undergoing its most significant transformation since the invention of paper money. As physical cash usage declines and private cryptocurrencies like Bitcoin gain prominence, central banks are stepping into the digital arena. According to the Atlantic Council’s CBDC Tracker, over 130 countries – representing 98% of global GDP – are now exploring a Central Bank Digital Currency (“CBDC”).

But what exactly is a CBDC? At its core, it is a digital form of a country’s sovereign currency, issued and regulated directly by the nation’s central bank. Unlike the digital balance you see in your commercial bank app, a CBDC is a direct liability of the central bank, making it a digital equivalent of the physical banknotes in your wallet.

What is a CBDC? Defining digital sovereignty

To understand CBDCs, one must first distinguish them from the “digital money” we already use. Most money held by the public today is commercial bank money. When you deposit cash into a private bank, that bank owes you the money; if the bank fails, your funds are at risk (unless insured). A CBDC, however, is central bank money. It is a risk-free claim against the state, much like physical cash, but in a purely digital format.

CBDCs are designed to provide a safe, stable, and widely accessible medium of exchange. They are not cryptocurrencies in the traditional sense. While Bitcoin is decentralized and operates on a public blockchain without a middleman, a CBDC is centralized and controlled by a governing authority.

The two main architectures: retail vs. wholesale

The architectural framework of a CBDC typically follows one of two primary models, distinguished by their intended users and specific economic functions: retail or wholesale.

Retail CBDC is designed specifically for the general public, acting as a digital extension of physical cash that allows individuals and businesses to hold sovereign currency in digital wallets or specialized accounts. Beyond simply facilitating daily transactions like grocery shopping or utility payments, a retail model aims to foster financial inclusion by providing a safe, state-backed payment option for the unbanked and serving as a critical safety net should private payment infrastructures face outages.

In contrast, a Wholesale CBDC is significantly more restrictive in scope, serving as a high-value settlement tool reserved exclusively for financial institutions, such as commercial banks and clearinghouses. Еhe primary objective of the wholesale model is to modernize the “plumbing” of the financial system. By streamlining interbank settlements and optimizing complex cross-border transfers, wholesale CBDCs utilize advanced technology to reduce the reliance on multiple intermediaries, thereby lowering transaction costs and mitigating settlement risks. While retail versions focus on the accessibility and convenience of the everyday consumer, wholesale versions prioritize the efficiency and stability of the systemic financial architecture, though many nations are currently exploring how both models might operate in tandem to fully modernize the national monetary lifecycle.

How it works: technology and design

The operational mechanics of a CBDC depend heavily on its underlying technological architecture, which varies based on a nation’s specific economic priorities. Central banks typically choose between two primary design frameworks: an account-based system or a token-based (value-based) model.

In an account-based framework, transactions are verified by confirming the identity of the account holder, a process mirrored in modern commercial banking but recorded directly on a central bank ledger. Conversely, a token-based model verifies the transaction based on the validity of the digital “token” itself, much like a merchant checking the physical security features of a banknote for authenticity. This latter approach offers significantly greater potential for user anonymity, though it introduces more complex security challenges related to digital counterfeiting and the recovery of lost funds. Furthermore, the infrastructure supporting these designs can range from traditional centralized databases to Distributed Ledger Technology (“DLT”) or blockchain. While DLT can enhance system resilience and transparency through decentralization, centralized databases often offer superior transaction speed and scalability, forcing central banks to strike a delicate balance between performance, security, and the privacy requirements of their citizens.

Why do central banks want digital currency?

The push for CBDCs is driven by several strategic goals:

Financial Inclusion: In many regions, a significant portion of the population is “unbanked.” A retail CBDC can provide these individuals with access to a safe digital payment system via a simple smartphone app, without needing a traditional bank account.
Efficiency and Cost: Physical cash is expensive to print, transport, and secure. Digital currency reduces these overheads and enables real-time transaction settlement.
Monetary Policy Implementation: CBDCs give central banks a more direct line to the economy. For instance, they could distribute stimulus funds directly into citizens’ bank accounts during a crisis.
Maintaining Sovereignty: With the rise of stablecoins and BigTech payment systems, central banks fear losing control over the money supply. A CBDC ensures the national currency remains the primary unit of account.

Risks and privacy concerns: the “big brother” factor

The transition to CBDCs is not without controversy. The European Data Protection Supervisor (“EDPS”) has raised significant points regarding privacy and data protection. Unlike physical cash, which is anonymous, digital transactions leave a trail.

Surveillance: There are concerns that governments could monitor every transaction made by a citizen, leading to a loss of financial privacy.
Banking Disintermediation: If everyone moves their money from commercial banks to “safer” central bank accounts, private banks may lose the deposits they use to fund home and business loans. This could destabilize the traditional banking sector.
Cybersecurity: A centralized digital currency is an attractive target for hackers. A successful breach of a national CBDC system could have catastrophic economic consequences for a country.

The global landscape: who is leading?

The Atlantic Council tracks the progress of various nations. Currently:

China is the leader among major economies with its e-CNY pilot, which has already seen billions in transaction volume.
The Bahamas launched the Sand Dollar in 2020, making it the world’s first fully operational retail CBDC.
The European Central Bank (“ECB”) is in the preparation phase for the Digital Euro, focusing heavily on privacy-preserving technologies.

Conclusion

CBDCs represent the next evolution of money – a bridge between the stability of traditional finance and the efficiency of digital technology. While they promise faster payments and greater inclusion, they also force us to confront difficult questions about privacy and the state’s role in our personal finances.

As we move toward a “cash-less” society, the success of CBDCs will depend not just on the technology, but on the trust citizens have in their central banks to protect their data and their freedom. The future of money is digital, but its final form is still being written.

At Manimama Law Firm

At Manimama Law Firm, we assist businesses in navigating this regulatory environment. We support documentation, manage application processes, and develop long-term compliance strategies for crypto-related businesses.