According to the World Bank, approximately 850 million people worldwide lacked an official form of identification when its identification research was published. Digital identity technologies therefore have potential relevance not only for convenience but also for broader access to digital services.
How Decentralized Identity Technology Works
The technology can look complicated at first, but its basic structure involves several participants.
1. The Issuer
An issuer is an organization that verifies information and creates a digital credential.
In banking, an issuer could be:
- A bank
- A government authority
- A regulated financial institution
- Another trusted identity provider
The issuer checks information before creating the credential.
For example, a bank may verify a customer’s government ID and biometric information before issuing a credential confirming that the person has passed an identity verification process.
2. The Holder
The holder is the individual or organization that receives and controls the credential.
A customer might store credentials inside a digital identity wallet on a smartphone.
The wallet does not necessarily need to contain every piece of personal information. Instead, it can hold cryptographically protected credentials that can be presented when required.
3. The Verifier
The verifier is the organization requesting proof of identity.
In banking, this could be another bank, payment provider, lending platform, or financial application.
The verifier checks whether the credential is authentic, valid, and issued by a trusted source.
This creates a basic three-party model:
Issuer → Holder → Verifier
The customer sits at the center rather than having to repeatedly provide the same information directly to every organization.
The Role of Verifiable Credentials
Verifiable credentials are one of the most important technologies behind decentralized identity.
A verifiable credential is a digitally signed statement containing information that can be cryptographically checked.
For example, a credential could confirm that:
- A customer’s identity has been verified
- The customer is above a required age
- A particular document has been validated
- A customer has passed a specific compliance check
The verifier can check the credential without necessarily contacting the original issuer every time.
This can make identity verification more efficient while reducing unnecessary data sharing.
The World Wide Web Consortium (W3C) has established standards for verifiable credentials, helping create a common technical framework for interoperable digital identity systems.
Decentralized Identifiers and Blockchain
Decentralized identifiers, commonly known as DIDs, are another important component.
A DID provides a digital identifier that can be associated with a person, organization, or other entity without necessarily depending on a centralized identity provider.
Some decentralized identity systems use distributed ledger technology to support verification and trust.
However, decentralized identity does not mean that every personal detail must be stored on a blockchain.
In fact, storing sensitive customer information directly on a public blockchain could create serious privacy concerns.
A more practical architecture can keep personal information and credentials off-chain while using cryptographic mechanisms or distributed infrastructure to support verification.
How a Bank Could Use Decentralized Identity
Imagine a customer wants to open an account with a new digital bank.
Step 1: Identity Verification
The customer completes an initial identity check with a trusted issuer.
The process could involve:
- Government ID verification
- Facial matching
- Document authentication
- Customer information checks
Step 2: Credential Issuance
After successful verification, the issuer provides a digitally signed credential.
The customer stores it in a compatible identity wallet.
Step 3: Customer Requests a New Service
The customer later applies for another financial service.
Instead of uploading identity documents again, the customer presents the relevant credential.
Step 4: Bank Verifies the Credential
The bank checks the credential’s cryptographic proof, issuer, validity, and applicable requirements.
Step 5: Selective Information Sharing
The customer may provide only the information required for the transaction.
This creates a more streamlined identity process.
Benefits of Decentralized Identity in Banking
Greater Customer Control
Traditional identity systems often require customers to submit personal information to multiple organizations.
Decentralized identity can give individuals greater control over when and where credentials are presented.
This does not mean customers have unlimited control over regulatory requirements. Banks may still be legally required to collect and retain specific information.
Reduced Repetition
A customer may need to complete identity verification multiple times when dealing with different financial institutions.
Reusable credentials could reduce unnecessary repetition.
If a customer completes one verified identity process and can reuse an appropriate credential across several services, the onboarding experience could become significantly faster.
Improved Privacy
Selective disclosure is another potential advantage.
Instead of sharing an entire identity document, a customer could potentially provide only a required attribute.
For example, a service might only need confirmation that a customer meets an age requirement rather than receiving the customer’s complete identification document.
Better Interoperability
Standardized digital credentials could allow identity information to move between compatible services.
This is particularly relevant as financial services become increasingly connected through APIs and digital platforms.
Decentralized Identity and Banking Security
Security is central to the concept.
Decentralized identity systems can use cryptographic signatures to help prove that a credential came from a legitimate issuer and has not been altered.
They can also reduce reliance on centralized databases containing large amounts of personal information.
However, decentralization does not automatically make a system secure.
Potential risks include:
- Lost or compromised identity wallets
- Stolen authentication credentials
- Weak recovery mechanisms
- Malicious issuers
- Poor implementation of cryptographic systems
Banks therefore need strong authentication, recovery procedures, monitoring, and governance.
Decentralized Identity vs Traditional Digital Identity
The difference can be summarized simply.
Traditional digital identity:
- Identity information is often stored separately by each service provider.
- Customers may repeatedly submit the same information.
- Organizations maintain their own identity databases.
- Identity management is frequently provider-centered.
Decentralized identity:
- Customers can hold reusable digital credentials.
- Credentials can potentially be presented to multiple services.
- Cryptographic verification helps establish authenticity.
- Identity management can become more user-centered.
The technology does not necessarily eliminate centralized institutions. Banks, governments, and regulated identity providers can still play important roles as trusted issuers.
Challenges for Banks
Regulatory Compliance
Banks must follow KYC, AML, data protection, and other financial regulations.
A decentralized identity solution must therefore support regulatory obligations rather than simply prioritizing convenience.
Interoperability
Different identity wallets, credential formats, and verification systems need to work together.
Without widely adopted standards, decentralized identity could create another collection of disconnected systems.
Customer Adoption
Customers need to understand how digital identity wallets work and how to protect their credentials.
If the user experience is confusing, adoption may remain limited.
Recovery and Account Protection
A traditional password can often be reset through an established recovery process. Decentralized identity can require more carefully designed recovery mechanisms because control over credentials may sit closer to the individual.
Adoption and Market Outlook
Decentralized identity remains an emerging area of financial technology rather than a universal replacement for existing KYC systems.
The broader digital identity market is expanding rapidly. MarketsandMarkets has projected strong growth for the global digital identity market over the coming years, driven by demand from financial services, government, healthcare, and other sectors.
At the same time, the European Union’s Digital Identity Wallet initiative is accelerating interest in portable digital credentials. The EU has stated that member states will provide digital identity wallets to citizens, residents, and businesses under the European Digital Identity framework, with implementation milestones beginning in 2026.
This development could influence how banks think about reusable digital credentials and customer-controlled identity.
The Future of Decentralized Identity in Banking
The most realistic future may not be a completely decentralized banking identity system.
Instead, banks could adopt hybrid identity architectures that combine centralized compliance systems with decentralized credentials.
A future customer journey might look like this:
Verify once → Receive trusted credential → Store it securely → Present only required information → Complete verification
Artificial intelligence could also work alongside decentralized identity by detecting suspicious behavior, while cryptography provides proof that credentials are authentic.
The result could be a banking environment where identity verification becomes less repetitive without sacrificing security or regulatory oversight.
Conclusion
Decentralized Identity in Banking introduces a different way to think about digital identity. Rather than requiring customers to repeatedly provide the same personal information to every financial institution, the technology can allow verified credentials to be held, controlled, and selectively presented by customers.
Verifiable credentials, decentralized identifiers, cryptography, and digital wallets form the technical foundation of this approach.
The technology still faces challenges involving regulation, interoperability, security, adoption, and credential recovery. It is therefore better viewed as an evolving component of banking technology rather than a complete replacement for conventional KYC systems.
