Definition:

Digital identity is the collection of data, identifiers, accounts, content and relationships that represent a person or organization in digital environments. It is formed by information supplied directly, activity recorded by platforms and material published by third parties.

It is not a separate copy of someone’s offline identity. Online and offline activity can be connected through names, images, email addresses, devices, transactions and other signals. One person may also use different contextual identities for personal, professional or community settings without those identities being false.

Elements of digital identity

Digital identity combines information from different sources. Its common components include:

Identifiers: A name, alias, username, email address, customer number, domain or account identifier.
Profiles and credentials: Accounts, roles, permissions and the means used to demonstrate control over them.
Declared content: Biographies, photographs, professional information, preferences and original posts.
Observed activity: Purchases, searches, locations, interactions and access logs, depending on the service and its settings.
Third-party information: Mentions, tags, reviews, images and references published by other people or organizations.

These elements do not provide the same level of assurance. A username can be chosen freely, whereas a verified account or electronic document may be connected to a more demanding verification process.

Functions of digital identity

Digital services use identity to recognize subjects and maintain relationships over time. Its common functions include:

Access: Associating an account with specific permissions, preferences and resources.
Interaction: Participating in networks, communities, public services, education platforms or workplaces.
Transactions: Connecting requests, purchases, payments or contracts with an account or entity.
Personalization: Adapting content and communications to recorded data or behavior.
Representation: Showing who a person or organization is and what activities they perform.

For a company, digital identity includes domains, profiles, content and external references. Corporate identity defines deliberate visual and conceptual traits, but it does not cover every trace and interaction associated with the organization online.

Digital identity and online reputation

Identity brings together signals used to recognize and describe a subject. Online reputation, by contrast, is the assessment other people form from those signals, their experience and information supplied by third parties.

The two concepts are related, but they are not equivalent. An organization controls its own profiles and publications, but it does not fully control the opinions, news or reviews affecting its reputation. Correcting false information, responding transparently and maintaining consistent official sources can reduce confusion without necessarily removing every negative reference.

Identity and authentication

Authentication checks that someone controls an account or credential; it does not automatically prove every attribute they claim. A password, passkey or second factor can demonstrate authorized access, while identity verification attempts to bind the account to a particular person or organization.

The level of assurance depends on risk. A forum may accept an alias and email address, while a bank or public authority may require documents, certificates or additional checks. Systems also assign digital identities to devices, applications and services to determine which operations they may perform.

Digital identity on social media

On social networks, identity is expressed through a profile, username, posts, interactions and connections. It also includes content the person did not publish directly, such as mentions, tagged photographs or third-party comments.

A fake account may imitate names, images or messages to impersonate another person or brand. Consistency between official channels, profile verification and netiquette rules help identify legitimate sources and maintain recognizable communication.

Digital identity management

Managing digital identity means knowing the information, deciding its visibility and protecting access. Useful measures include:

Inventory accounts: Locate profiles, email addresses, domains and associated services, including those no longer used.
Review privacy: Check who can see the data and restrict information that is not necessary.
Protect access: Use unique passwords or passkeys, a password manager and multifactor authentication where available.
Monitor mentions: Periodically search names, brands, aliases and images to detect errors or impersonation.
Check incidents: Review provider alerts and services such as Have I Been Pwned to see whether an email address appears in a known breach.
Remove old access: Close unnecessary accounts and revoke applications or sessions that should no longer retain permissions.

Information cannot always be removed immediately or disappear from copies, archives and third-party publications. Sustainable management therefore combines security, data minimization and periodic review instead of relying only on deleting visible results.