G-P18 · TOPIC · identity-and-authenticationGCRI dossier · service level R0
GCRIDigital Public InfrastructureIn development
Topic dossier · Digital Public Infrastructure

Identity and authentication

Digital identity systems let people prove who they are to access services, open accounts, receive benefits and vote. Hundreds of millions of people still lack official identification, while identity systems that collect too much data or exclude people can cause harm. This page sets out how identity and authentication systems work, how coverage and assurance are measured, and what evidence serves the governments and regulators who build and oversee them.

01In brief

The short answer.

Digital identity is the set of attributes and credentials that let people prove who they are online to access services, accounts and benefits. Foundational identity enables others, gaps fall on marginalised people, centralised data raise risk and authentication strength must match the risk of each use.

02Geography

Connected activity in India.

Night-time lights and population density, the footprint of electrified, connected activity, framed on India; each layer is a dated NASA product.

The interactive map needs JavaScript; the layer list and sources are below.

Layers 2

Connected activity

Latest available

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Natural Earth

Loading the latest NASA imagery.

Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.

Night-time lights and population density, the footprint of electrified, connected activity, framed on India.Satellite and model products as NASA publishes them, each with its own date; indicators, not assessments of any place; claim ceiling INTEGRATED.

Data: NASA GIBS · ASTER GDEM · Natural EarthSources and licences

  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • VIIRS Black Marble night-time lights, NASA Goddard Space Flight Center; distributed by the NASA Level-1 and Atmosphere Archive and Distribution System (LAADS DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). CC BY 4.0
  • VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
  • Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.

Layers and dates

  • Night-time lights, daily: VIIRS Black Marble (VNP46A2), NASA LAADS DAAC · 12 Oct 2026
  • Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
  • True colour: VIIRS NOAA-20 corrected reflectance, NASA LANCE · 13 Oct 2026

03The question

Identity and authentication: how the risk develops.

Identity infrastructure, exclusion and consent. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mechanism

Foundational identity enables others

A foundational identity, such as a national ID or civil registration, underpins functional credentials for health, voting, banking and benefits.

Mechanism

Gaps fall on the marginalised

People without identity documents are disproportionately poor, rural, women, stateless or displaced. Requiring ID for services can exclude them further.

Mechanism

Centralised data raise risk

Large identity databases are attractive targets and can enable surveillance. Data minimisation, purpose limits and oversight reduce risk.

Mechanism

Assurance must fit the use

Authentication strength should match the risk of the transaction. Too weak invites fraud; too strong excludes people with limited devices or skills.

04Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
Foundational identityA general-purpose legal identity, such as a civil register or national ID, used across services.
Functional identityAn identity credential issued for a specific purpose, such as voting or health insurance.
AuthenticationThe process of verifying that a person is the holder of a claimed identity.
05Indicators

What is measured, and how well.

Each indicator carries its unit, its cadence, the kind of source behind it and the evidence label a value would carry. No values are shown: a programme supplies them under its own authority.

IndicatorUnitCadenceSource typeLabel
Population with a foundational IDpercent of populationper surveyID4D global dataset and surveysESTIMATED
Birth registration completenesspercent of births registeredannualCivil registration statisticsESTIMATED
Authentication failure ratepercent of attemptsmonthlySystem operator recordsOBSERVED
Identity data breachescountannualRegulator and incident reportsREPORTED
Identity systems with independent oversightstatusper assessmentLegal and institutional reviewDECLARED
People unable to access services due to ID requirementspercent of surveyed populationper surveyHousehold surveysREPORTED
06Canvas

From sources to decisions.

The topic as a computational graph: named sources feed the methods, an evidence review gates the outputs, and the decisions stay with the authorities that hold them.

Pipeline canvas · Identity and authentication as a run graphDesign, not a record
Identity and authentication: a public service over digital public infrastructureA person proves who they are, consents to share data, the agency exchanges data through agreed interfaces, pays through the switch, and any grievance is redressed; every step is auditable. Design of the process, not a record of a run.

Fig. 02Nodes carry their type, two metric rows and a state; connectors show what feeds what; dashed frames name the owners; the timeline is the cadence. Design of the pipeline, not a record of a run.

07Sources

Where the evidence comes from.

Named public datasets and institutional records, each with its licence class. Sources by agreement are used only under their terms and never republished.

SourceWhat it givesLicence class
World Bank ID4D global dataset and diagnosticsIdentification coverage and system assessmentsPublic, World Bank terms
UNICEF birth registration dataBirth registration by countryPublic, UNICEF terms
NIST Digital Identity Guidelines (SP 800-63)Identity proofing and authentication assurance levelsPublic domain, US government
Data protection authority reportsBreaches and enforcement concerning identity dataPublic records, licence per authority
Civil society assessments of identity systemsRights and inclusion analysesPublic, terms per publisher
08Decisions

Who decides, and what the evidence serves.

Digital Public Infrastructure prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Who decidesThe questionEvidence this page serves
Ministries responsible for identity and civil registrationHow to close coverage gaps and design safeguardsCoverage profiles; safeguard assessments
Service providers and regulatorsWhat identity assurance to require for each serviceAssurance reviews
Data protection authoritiesHow to oversee identity dataBreach and oversight evidence

Outputs this topic produces

  • Identity coverage and exclusion profiles
  • Assurance level reviews matched to service risk
  • Safeguard assessments against the UN DPI Safeguards Framework
  • Evidence notes for identity governance
09Core questions

What experts ask.

Proof of identity is a gateway to almost everything else: health care, education, social protection, financial services, property and voting. Many people worldwide still lack recognized proof of identity, often the poorest and most marginalized. Digital identity can close that gap, but systems that are hard to enrol in, rely on a single biometric or concentrate personal data can create new forms of exclusion and new risks to privacy.

  • Who can enrol in an identity system, and who is left out because of documents, disability, location, gender or status?
  • How reliable is authentication for different groups, and what happens when it fails?
  • What personal data does the system collect, who can access it and under what legal safeguards?
  • Can people use their identity with consent and selective disclosure, sharing only what a service needs?
10Mechanisms

Drivers and processes.

Identity systems combine registration, credentials, authentication and governance.

Registration

Foundational records

Civil registration of births and deaths and population registers provide the base. Gaps in registration carry through into digital identity.

Authentication

Checking identity

Passwords, cards, mobile credentials and biometrics each fail in different ways. Biometric matching works less well for some people, such as manual labourers and older people.

Governance

Rights and oversight

Legal basis, purpose limitation, independent oversight and redress decide whether identity serves people or monitors them.

A central lesson from national experience is that identity systems should not become mandatory gateways before they reach everyone. Where services require digital authentication before enrolment is universal and alternatives exist, the people most in need are often the ones turned away. Safeguards such as assisted channels, exception handling and clear routes to redress are part of the infrastructure, not additions to it.

11Methods and data

How the evidence is built, and its limits.

  1. 01

    Coverage data

    Registration and enrolment statistics show reach but often miss the people least likely to be counted.

  2. 02

    Authentication failure analysis

    Error rates by method and population group. They are not always published, and averages can hide large differences.

  3. 03

    Legal and rights review

    Analysis of legal frameworks, data protection and oversight. Law on paper may differ from practice.

  4. 04

    User research

    Studies of how people experience enrolment and authentication, complementing technical work under digital identity and public digital systems.

12Methods

How it is studied, and what the methods cannot say.

  1. Digital identity and public digital systemsAssurance design for services · Verifiable credentials · Exclusion error analysisApplied here
  2. Cybersecurity and cryptographyThreat modelling DPI components · Protecting identity databasesApplied here
  3. Data engineering, interoperability and stewardshipSecure data exchange layers · Common data models · Consent-based sharingApplied here
14Questions

Questions and answers.

What is foundational identity?
A general-purpose identity, such as a civil register or national ID, that establishes who a person is and can support other credentials.
What is an identity assurance level?
A measure of confidence that a person is who they claim to be, set by how thoroughly identity was verified and how strongly it is authenticated.
Why can digital ID exclude people?
Because people without documents, devices, connectivity or skills, or whose biometrics fail, may be unable to enrol or authenticate when ID is required.
Should identity systems use biometrics?
Biometrics can help where documents are scarce, but they fail for some people and create sensitive data that cannot be changed if breached. Evidence suggests offering alternatives and limiting central storage.
What is selective disclosure?
The ability to prove a specific fact, such as being over a certain age, without revealing the rest of one's identity data. It reduces unnecessary data sharing.
Is a national identity number a risk?
A single identifier used across many services makes it easier to link records about a person. Sector-specific identifiers and strong legal limits reduce that risk.
Does the platform hold identity data?
No. It does not hold or process identity data and works only from published and aggregated evidence.
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