What is IAM (Identity and Access Management): a complete guide

IAM (Identity and Access Management) is the set of processes and technologies that manage digital identities and control who can access which resources, when, and with what privileges.

What Identity and Access Management is

In a modern organization every user — employee, customer, partner — has a digital identity and a set of permissions. IAM is the discipline that manages the lifecycle of these identities and governs access to applications and data. It is the foundation of access security: without coherent IAM, control over "who can do what" becomes fragmented and risky.

The key components of an IAM

Authentication

Verifies that a user is who they claim to be. It can rely on passwords, a second factor (see 2FA vs MFA), or passwordless methods.

Authorization

Determines what an authenticated user can do, based on roles and policies (least-privilege principle).

Provisioning and deprovisioning

The timely creation and removal of accounts across the user lifecycle. Missed deprovisioning is one of the most common causes of orphaned access.

SSO and MFA

Single Sign-On lets users access multiple applications with a single authentication; multi-factor authentication strengthens the security of sensitive access.

IAM, CIAM and Identity Provider

When IAM targets end customers it is called CIAM (Customer IAM). The Identity Provider (IdP) is the system that issues and verifies identities, often via standards like SAML and OpenID Connect. See the differences between OAuth 2.0, OIDC and SAML.

How to choose an IAM platform

• Functional coverage: SSO, MFA, provisioning, multi-tenant management.
• Compliance and data sovereignty: where identities reside and who can access them.
• Pricing model: per user or per tenant/project.
• Open standards (SAML, OIDC) to avoid lock-in.
• Support and traceability of access events.

We explored the compliance criterion in our article on European IAM and data sovereignty. To see how LoginMaster implements these components, visit the features page.

IAM glossary: the key terms

Identity management has its own vocabulary. Here are the definitions of the terms that come up most often, with links to deeper reads.

IAM (Identity and Access Management)

The set of processes and technologies that manage the lifecycle of digital identities and govern access to applications and data, following the least-privilege principle. When it targets end customers it is called CIAM.

MFA (multi-factor authentication)

A method that requires two or more independent factors to verify identity — something you know (password), something you have (token, smartphone) or something you are (biometrics). 2FA is the two-factor case: the difference is explained in 2FA vs MFA.

SSO (Single Sign-On)

A feature that lets users access multiple applications with a single authentication, reducing passwords and centralizing access control. Deeper read: what Single Sign-On is.

Zero Trust

A security model that grants no implicit trust to any user or device: every access request is always verified, based on identity, context and least privilege. See the Zero Trust page.

NIS2

The European cybersecurity directive that extends risk-management and access-control obligations to a broad range of organizations. A solid IAM is one building block of compliance: see compliance and the article on NIS2 and access management.