Public vs. Private Blockchain Infrastructure for RWAs
Why the infrastructure supporting tokenized real-world assets may involve public networks, permissioned systems, and increasingly, combinations of both
As tokenization moves from experimentation toward financial-market infrastructure, an important question is becoming increasingly relevant: where should tokenized real-world assets actually operate?
Public blockchains offer open, shared infrastructure capable of connecting participants across organizations and jurisdictions. Private or permissioned blockchain networks offer greater control over participation, governance, privacy, and operational rules.
Both approaches can support tokenized real-world assets (RWAs), but they solve different problems and introduce different tradeoffs.
The debate is therefore more complicated than deciding whether public or private blockchain infrastructure is inherently better.
A government security, tokenized investment fund, private credit instrument, real estate interest, or other RWA exists within a broader legal and operational framework. Its infrastructure must accommodate investor eligibility, custody, regulatory compliance, transaction privacy, settlement, asset servicing, governance, and interoperability.
Different assets and market participants may require different combinations of these capabilities.
The future of RWA infrastructure may consequently be less about choosing between public and private blockchains and more about determining which architecture is appropriate for a particular financial activity.
What Makes a Blockchain Public or Private?
The distinction between public and private blockchain infrastructure begins with participation and control.
A public blockchain generally allows a broad range of participants to access the network, submit transactions according to its rules, and independently verify the state of the ledger. Networks such as Ethereum are examples of public blockchain infrastructure.
A private or permissioned blockchain restricts some combination of network access, transaction submission, validation, or data visibility to authorized participants. Governance may be controlled by one organization or distributed among a defined group of institutions.
The distinction is not always binary.
A network may be publicly accessible while individual financial applications impose strict eligibility requirements. Another system may use a permissioned ledger while periodically interacting with public blockchain infrastructure. Financial institutions can also maintain private information off-chain while using a public network for selected transaction or settlement functions.
For RWAs, the relevant question is therefore not simply whether a blockchain is public or private.
It is which functions are open, which are permissioned, who controls them, and how the system interacts with the legal and financial infrastructure surrounding the asset.
Why Public Blockchains Are Attractive for RWAs
Public blockchains provide a shared infrastructure that is not controlled exclusively by a single financial institution.
That characteristic creates several potential advantages for tokenized assets.
Shared Infrastructure
Traditional financial markets frequently depend on institution-specific databases and communication systems. When several organizations participate in a transaction, records may need to be exchanged and reconciled across those systems.
Public blockchains provide a common transaction layer.
Issuers, custodians, investors, administrators, and other authorized participants can potentially interact with the same underlying network rather than requiring separate bilateral infrastructure for every relationship.
The financial applications built on top of that network can still impose their own rules.
This distinction is important: public infrastructure does not necessarily mean unrestricted financial participation.
A tokenized security operating on a public blockchain can still restrict transfers to approved addresses, require identity verification, or limit participation according to applicable securities laws and offering terms.
Transparency and Verifiability
Public blockchains generally allow transactions and token balances to be independently verified.
For some financial applications, this can improve visibility into the movement and distribution of tokenized assets.
Investors, issuers, auditors, and service providers may be able to verify certain blockchain records without relying entirely on information maintained by a single intermediary.
However, blockchain transparency has limits.
An on-chain record can demonstrate that a transaction occurred according to the network's rules. It does not independently establish that an underlying property exists, that a valuation is accurate, or that a legal claim is enforceable.
Real-world information still requires appropriate legal documentation, administrators, custodians, auditors, data providers, or other trusted sources.
Interoperability and Composability
Another potential advantage of public blockchain infrastructure is the ability for different applications to interact through common technical standards.
A tokenized asset might potentially connect with compatible custody systems, payment infrastructure, trading applications, collateral systems, or other financial services operating on the same network.
This characteristic is sometimes described as composability.
Rather than building a separate technological environment for every financial product, institutions may be able to use common infrastructure while developing specialized applications on top of it.
For capital markets, this could become particularly important if tokenized securities, tokenized deposits, stablecoins, funds, collateral, and other financial instruments increasingly need to interact.
Broader Distribution Infrastructure
Public blockchains are accessible through the internet across jurisdictions.
Technically, this can make it easier for issuers and service providers to build financial applications capable of interacting with participants in different locations.
But technical accessibility must not be confused with legal accessibility.
An investor's ability to access a blockchain does not automatically make that investor eligible to purchase a financial instrument.
Securities laws, investor qualifications, sanctions requirements, anti-money-laundering controls, tax obligations, and other restrictions continue to apply.
Public blockchain infrastructure can expand technical connectivity. It does not remove the regulatory boundaries surrounding financial markets.
Why Financial Institutions Use Private and Permissioned Networks
The characteristics that make public blockchains attractive can also create challenges for regulated financial institutions.
Banks, asset managers, custodians, exchanges, and market-infrastructure providers operate under requirements involving confidentiality, cybersecurity, governance, operational resilience, and regulatory oversight.
Permissioned blockchain infrastructure can provide greater control over these factors.
Controlled Participation
A permissioned network can restrict participation to verified institutions or approved users.
This can simplify certain aspects of identity management and compliance because participants can be screened before receiving network access.
For institutional markets, this may be particularly useful where transactions occur between known counterparties.
A network designed for banks, for example, might permit transaction validation only by approved institutions operating under agreed governance rules.
Public networks can also support permissioned financial applications, but private infrastructure can enforce restrictions at the network level itself.
Transaction Privacy
Financial institutions frequently handle information that cannot simply be exposed publicly.
Transaction sizes, counterparties, positions, client information, and trading strategies may be commercially sensitive or legally protected.
Public blockchains create challenges when transaction information is broadly visible, even where addresses are pseudonymous.
Permissioned systems can provide more granular control over who can see particular information.
This can be important for institutional transactions involving large positions, confidential commercial relationships, or protected customer information.
Privacy-enhancing technologies may increasingly allow public or hybrid blockchain systems to address some of these concerns, but privacy remains an important architectural consideration.
Governance and Operational Control
Traditional financial infrastructure has clearly defined governance.
Organizations establish rules for system upgrades, participant responsibilities, incident management, dispute resolution, and operational recovery.
Permissioned blockchain systems can reproduce similar governance structures.
A consortium of financial institutions might collectively determine who can operate nodes, how software updates occur, what happens during operational disruptions, and how participants are admitted or removed.
For regulated institutions, the ability to identify who is responsible for infrastructure can be operationally important.
Public blockchains use different governance models, which may distribute decision-making across developers, validators, token holders, foundations, or broader communities depending on the network.
Neither approach eliminates governance.
They distribute governance differently.
Comparing the Two Models
The differences between public and private blockchain infrastructure become clearer when considered across the requirements of financial markets.
Consideration
Public Blockchain
Private / Permissioned Blockchain
Network access
Generally open
Restricted to authorized participants
Validation
Distributed according to public network rules
Limited to approved validators
Transaction visibility
Often broadly visible
Can be selectively restricted
Governance
Distributed across the network's governance structure
Defined by an institution or consortium
Infrastructure reach
Potentially global
Primarily participating organizations
Composability
Potentially high within compatible ecosystems
Usually limited to connected participants and systems
Identity
Network participation may be pseudonymous
Participants can be identified before access
Application-level compliance
Usually implemented through tokens, smart contracts, identity layers, and service providers
Can be implemented at both network and application levels
Operational control
Less direct control for individual institutions
Greater institutional control
Privacy
Requires additional mechanisms where confidentiality is necessary
Can be designed around restricted information access
These are general characteristics rather than universal rules.
Blockchain architectures continue to evolve, and individual networks may combine characteristics from both categories.
Permissioned Assets Can Exist on Public Blockchains
One of the most important distinctions in the RWA discussion is between permissionless infrastructure and permissionless assets.
They are not the same thing.
A public blockchain may allow anyone to submit transactions to the network while a tokenized financial instrument operating on that blockchain restricts who can own or transfer it.
For example, a tokenized fund could require investors to complete identity and eligibility checks before their blockchain addresses are authorized.
The token's smart contract could then restrict transfers to addresses meeting the applicable requirements.
The underlying blockchain remains public.
The financial asset remains permissioned.
This architecture attempts to combine the shared infrastructure and interoperability of public blockchains with the controlled participation required by regulated financial products.
It also illustrates why describing an RWA simply as "on a public blockchain" provides incomplete information.
Understanding the asset requires examining the entire structure surrounding it.
Private Blockchains Do Not Eliminate Intermediaries
Private blockchain systems are sometimes presented as a way for institutions to streamline financial processes.
But permissioned infrastructure does not eliminate the need for governance, custody, administration, compliance, or legal enforcement.
In many cases, the institutions operating the network themselves perform these functions.
A tokenized security on a private blockchain may still require an issuer, custodian, transfer agent or equivalent recordkeeping function, settlement mechanism, identity provider, administrator, and regulated intermediaries.
Blockchain may change how these organizations coordinate.
It does not necessarily make their responsibilities disappear.
This distinction matters because the economic value of tokenization should be evaluated against the complete operational process, rather than simply whether a blockchain has replaced a traditional database.
The Interoperability Problem
Private blockchain networks introduce another challenge: fragmentation.
If Bank A operates one tokenization platform, Bank B uses another, and an asset manager uses a third, the industry may reproduce the same interoperability problems that already exist in traditional financial infrastructure.
The databases may have changed, but the systems can still remain isolated.
This is one reason interoperability has become a central issue in institutional tokenization.
A tokenized asset may need to move between custody systems, trading venues, collateral platforms, payment networks, and different blockchain environments.
Without reliable connections between those systems, tokenization could create new technological silos.
Public blockchain infrastructure offers one potential response by providing a common settlement or transaction layer.
Another approach is to connect multiple permissioned networks through standardized messaging, interoperability protocols, or shared settlement infrastructure.
Hybrid architectures may combine both.
The appropriate solution depends on the financial activity and the risks involved.
Settlement Money Matters Too
Tokenizing the asset is only one side of a financial transaction.
The other side is payment.
If a tokenized bond can move instantly but payment still requires a separate banking process with different operating hours and settlement conditions, the transaction remains dependent on multiple systems.
This makes the development of digital settlement assets particularly important.
Tokenized commercial bank deposits, central bank money, and certain stablecoin structures are among the approaches being explored for moving money through blockchain-based financial infrastructure.
If the asset and payment can operate on compatible systems, programmable delivery-versus-payment mechanisms may allow the two transfers to be coordinated.
But this also introduces architectural questions.
What happens when a tokenized security exists on a public blockchain while the settlement asset operates on a private banking network?
How is finality established across the two systems?
How are identity, compliance, and privacy requirements maintained?
How does liquidity move between networks?
These questions demonstrate why the infrastructure discussion extends beyond selecting a blockchain for an individual token.
Tokenized capital markets require infrastructure capable of connecting assets, money, institutions, and legal rights.
Public Infrastructure Does Not Mean Decentralizing Everything
Another common assumption is that using a public blockchain requires every component of a financial product to become decentralized.
That is not necessarily the case.
A tokenized RWA can use decentralized blockchain infrastructure while continuing to depend on centralized organizations for essential real-world functions.
A real estate token may still require a legal entity to own the property.
A private credit instrument may still require a loan servicer.
A tokenized investment fund may still require an investment manager, administrator, custodian, and auditor.
A tokenized security may still depend on regulated intermediaries and legally recognized ownership records.
Blockchain can provide a shared technological layer without eliminating centralized responsibilities where they remain necessary.
The resulting system may therefore combine decentralized infrastructure with regulated institutions.
For RWAs, this hybrid organizational structure may be more relevant than attempting to decentralize every component of the asset lifecycle.
Hybrid Infrastructure May Become Increasingly Important
The distinction between public and private blockchain infrastructure becomes less clear as institutions experiment with hybrid architectures.
A financial institution might maintain confidential transaction information within a permissioned environment while using a public blockchain for settlement or verification.
An issuer might place a regulated token on a public network while restricting ownership to approved investors.
A financial-market infrastructure provider might maintain existing securities records while creating tokenized representations capable of interacting with blockchain-based markets.
Assets could potentially move between environments through controlled interoperability mechanisms.
These models attempt to combine different characteristics:
Public infrastructure can provide shared standards, broader connectivity, and interoperability.
Private infrastructure can provide controlled participation, confidentiality, and institutionally defined governance.
The challenge is connecting the two without introducing additional operational, legal, or cybersecurity risks.
Choosing Infrastructure Based on the Asset
There is unlikely to be one blockchain architecture appropriate for every RWA.
Different assets have different requirements.
A tokenized government security intended for use as institutional collateral may prioritize settlement finality, interoperability, and reliable access to payment infrastructure.
A private credit instrument may require strict investor eligibility, confidential borrower information, and controlled transfers.
A tokenized investment fund may need programmable subscriptions, redemptions, investor verification, and asset servicing.
A real estate structure may depend heavily on jurisdiction-specific property laws and off-chain administration.
These differences suggest that infrastructure decisions should begin with the financial product rather than the technology.
The relevant questions include:
- What legal rights does the token represent?
- Who is permitted to own and transfer it?
- Which information must remain confidential?
- Who must verify transactions?
- How will the asset be custodied?
- How will payments settle?
- What happens if a transaction must be corrected or disputed?
- Which institutions must interact with the asset?
- Does the asset need to move between networks?
- Which jurisdiction's laws govern ownership and transfer?
Only after answering these questions does the choice of blockchain architecture become meaningful.
Infrastructure Should Be Evaluated Across the Entire Lifecycle
The effectiveness of a blockchain architecture cannot be determined solely by issuance.
A tokenized asset may exist for years.
During that period, it may require distributions, valuation updates, regulatory reporting, investor transfers, collateralization, corporate actions, redemptions, or maturity payments.
Each event introduces interactions between the blockchain and real-world institutions.
The infrastructure therefore needs to support the entire lifecycle of the asset.
A system that makes issuance easy but complicates custody or servicing may simply move operational friction elsewhere.
Likewise, infrastructure that enables rapid transfers but cannot integrate with payment systems may provide limited settlement improvements.
The relevant measurement is not how quickly a token can be created.
It is whether the overall architecture improves the issuance, administration, transfer, settlement, and eventual redemption of the financial instrument.
The Question Is Becoming Less Binary
Public and private blockchain systems began from very different assumptions.
Public networks emphasized open participation, distributed validation, and shared infrastructure.
Institutional permissioned systems emphasized controlled access, privacy, governance, and integration with regulated financial institutions.
RWA tokenization is increasingly bringing these models into contact.
Public networks are developing more sophisticated identity, privacy, and compliance capabilities. Financial institutions are exploring ways to connect permissioned infrastructure with broader blockchain ecosystems. Traditional market-infrastructure providers are experimenting with tokenized representations of existing securities.
The result may not be a single winning architecture.
Instead, tokenized capital markets may develop as a network of interconnected environments: public blockchains, permissioned institutional networks, traditional financial systems, and hybrid infrastructure connecting them.
Conclusion: The Architecture Must Serve the Financial Market
The public-versus-private blockchain debate becomes more useful when it is reframed around financial infrastructure.
Public blockchains can provide shared infrastructure, broad connectivity, independent verification, and interoperability. Private and permissioned networks can provide controlled participation, transaction confidentiality, and institutionally defined governance.
Neither set of characteristics automatically makes one architecture appropriate for every tokenized asset.
RWAs exist at the intersection of technology and traditional legal and financial systems. Their infrastructure must support ownership rights, compliance, custody, administration, payments, settlement, and the ongoing obligations associated with the underlying asset.
For some applications, public blockchain infrastructure may provide the appropriate foundation. For others, permissioned environments may better accommodate institutional requirements. Many markets may ultimately use combinations of both.
The more important question is therefore not whether RWAs should use public or private blockchains. It is which infrastructure can most effectively support the legal, operational, and financial requirements of the asset throughout its lifecycle.