What is Identity and Access Management?

Identity and Access Management, commonly known as IAM, is the set of policies, processes, and technologies used to manage digital identities and control access to systems, applications, data, and infrastructure.

In simple terms, IAM helps organizations answer four critical questions:

1. Who are you?
2. Are you really who you claim to be?
3. What are you allowed to access?
4. Should you still have that access?

NIST describes Identity and Access Management as a fundamental cybersecurity capability focused on ensuring that the right people and things have the right access to the right resources at the right time.

IAM applies not only to employees, but also to contractors, partners, administrators, service accounts, applications, workloads, APIs, devices, and increasingly, AI agents.

Why is IAM Important?

Modern organizations rely on hundreds of applications, cloud platforms, SaaS tools, databases, internal systems, and business services. Every one of these systems needs a way to decide who can access what.

Without a strong IAM strategy, organizations may face serious security and operational risks, such as:

• Former employees keeping access after leaving the company
• Users having more privileges than they need
• Administrators using shared or unmanaged privileged accounts
• Service accounts running with excessive permissions
• Attackers using stolen credentials to move across systems
• Sensitive data being exposed to unauthorized users
• Compliance failures due to weak access governance

IAM is especially important because many modern attacks do not start with malware. They start with identity abuse. Attackers often steal credentials, compromise accounts, escalate privileges, and move laterally by using legitimate access paths.

IAM Definition

Identity and Access Management is a framework for creating, managing, verifying, authorizing, reviewing, and removing digital identities and their access rights across an organization's technology environment.

A complete IAM program usually includes:

• Identity management: Creating and managing users, groups, roles, service accounts, and other identities.
• Authentication: Verifying that an identity is legitimate.
• Authorization: Deciding what the identity is allowed to access.
• Access governance: Reviewing and controlling access rights over time.
• Lifecycle management: Managing access from onboarding to role changes to offboarding.
• Monitoring and auditing: Tracking access activity and detecting suspicious behavior.

NIST Digital Identity Guidelines cover key areas such as identity proofing, authentication, and federation, which are core building blocks of digital identity systems.

Authentication vs Authorization

Two of the most important IAM concepts are authentication and authorization.

Authentication confirms the identity of a user or system.

Example:

A user enters a password and approves a mobile push notification to prove who they are.

Authorization determines what that authenticated identity can access.

Example:

The same user can access the CRM system, but cannot access payroll records or production servers.

A simple way to remember it:

Authentication asks: "Who are you?" Authorization asks: "What are you allowed to do?"

Both are required. Strong authentication without proper authorization can still create risk if users have excessive access.

Core Components of IAM

1. Users and Identities

An identity represents a person, system, workload, application, device, or service that needs access to a resource.

Examples include:

• Employee accounts
• Contractor accounts
• Administrator accounts
• Service accounts
• Application identities
• API identities
• Machine identities
• Cloud workload identities
• AI agent identities

IAM is not only about human users anymore. Non-human identities are now a major part of enterprise access management.

2. Authentication

Authentication verifies whether an identity is legitimate.

Common authentication methods include:

• Passwords
• Multi-factor authentication
• Hardware security keys
• Biometrics
• Certificates
• Single Sign-On
• Federated login

CISA recommends requiring multi-factor authentication for remote access and privileged or administrative access, because MFA adds an additional layer of protection beyond passwords.

3. Authorization

Authorization defines what an identity can do after authentication.

Examples:

• Read a file
• Modify a database
• Access a SaaS application
• Create a cloud resource
• Reset another user's password
• Approve a financial transaction
• Manage security settings

Authorization is usually controlled through roles, groups, policies, permissions, and access rules.

4. Role-Based Access Control

Role-Based Access Control, or RBAC, assigns permissions based on job roles.

Example:

A finance employee may receive access to:

• Accounting software
• Invoice management
• Financial reports

But not:

• Source code repositories
• Security monitoring systems
• Production infrastructure

RBAC helps simplify access management, especially in larger organizations.

5. Least Privilege Access

Least privilege means users and systems should only have the minimum access required to perform their tasks.

Example:

A help desk employee may need permission to reset passwords, but they do not need full domain administrator access.

NIST Cybersecurity Framework 2.0 includes identity management, authentication, and access control under its Protect function, and highlights that access permissions should be managed, enforced, reviewed, and aligned with least privilege and separation of duties.

6. Identity Lifecycle Management

Identity lifecycle management controls what happens to an identity from creation to removal.

Typical lifecycle stages include:

1. User joins the organization
2. User receives access based on role
3. User changes department or responsibility
4. User access is updated
5. User leaves the organization
6. User access is removed

This process is critical because stale, orphaned, or forgotten accounts can become easy targets for attackers.

Real-World IAM Examples

Example 1: New Employee Onboarding

A new sales employee joins the company.

The IAM process should automatically grant access to:

• Email
• CRM
• Sales documents
• Video conferencing
• Internal communication tools

But the same employee should not receive access to:

• Payroll systems
• Engineering repositories
• Security tools
• Cloud administrator consoles

This is a basic IAM use case: giving the right access from day one without creating unnecessary risk.

Example 2: Employee Role Change

A finance employee moves to the procurement team.

Their old finance permissions should be removed, and new procurement permissions should be assigned.

If the old permissions are not removed, the employee may accumulate unnecessary access over time. This is known as privilege creep.

Privilege creep is risky because a compromised account may provide attackers with access to systems the user no longer needs.

Example 3: Contractor Access

A third-party consultant needs temporary access to a project management system for 30 days.

A secure IAM process should:

• Create a time-limited account
• Assign only project-specific access
• Require MFA
• Monitor activity
• Automatically remove access after the engagement ends

Without this process, contractor accounts may remain active long after the project is complete.

Example 4: Privileged Administrator Access

An IT administrator needs elevated access to troubleshoot a critical server.

Instead of giving permanent administrator rights, the organization can use:

• Just-in-time access
• Approval workflows
• Session monitoring
• Time-limited privileges
• Separate admin accounts

This reduces the risk of standing privileges being abused by attackers.

Example 5: Service Account Access

An application uses a service account to connect to a database.

The service account should only have the permissions required by the application. For example, if the application only needs to read customer records, the service account should not have permission to delete tables, create users, or modify database security settings.

Over-permissioned service accounts are dangerous because they are often long-lived, poorly monitored, and rarely reviewed.

Common IAM Risks

1. Weak Authentication

Passwords alone are often not enough. If credentials are stolen through phishing, malware, or password reuse, attackers may gain direct access to business systems.

2. Excessive Privileges

Users, administrators, applications, and service accounts often have more access than they need.

This increases the blast radius of a compromised identity.

3. Orphaned Accounts

Orphaned accounts are accounts that are no longer tied to an active employee, system owner, or business purpose.

Examples include:

• Former employee accounts
• Old contractor accounts
• Forgotten test accounts
• Legacy service accounts

These accounts are attractive targets because they are often unmanaged.

4. Shared Accounts

Shared accounts make it difficult to know who performed an action.

Example:

If five administrators use the same admin account, audit logs may show that the admin account made a change, but not which person actually performed the action.

This creates accountability, compliance, and investigation challenges.

5. Poor Access Reviews

Access rights change constantly. Employees move between teams, projects end, applications are retired, and responsibilities shift.

Without regular access reviews, unnecessary permissions remain active.

6. Misconfigured Groups and Roles

A single group membership or role assignment can grant broad access.

For example, adding a user to a highly privileged group may unintentionally give them control over critical systems.

7. Unmanaged Non-Human Identities

Service accounts, API keys, automation accounts, and workload identities are often created for technical reasons but forgotten over time.

These identities may have:

• No clear owner
• No expiration date
• Weak credential rotation
• Excessive privileges
• Limited monitoring

This makes them a growing identity security risk.

IAM Use Cases

Use Case	Description	Security Outcome
Employee onboarding	Automatically grant access based on job role	Faster access with fewer manual errors
Employee offboarding	Remove access when a user leaves	Reduces orphaned account risk
Role change management	Update access when responsibilities change	Prevents privilege creep
Privileged access control	Limit and monitor administrator access	Reduces high-impact compromise risk
Contractor access	Provide temporary, limited access	Reduces third-party access risk
Access reviews	Periodically validate user permissions	Improves governance and compliance
Service account governance	Review and control non-human identities	Reduces hidden machine identity risk
Cloud access management	Control access to cloud resources	Reduces cloud misconfiguration risk
Compliance reporting	Prove access controls are managed	Supports audit readiness

IAM Best Practices

1. Centralize Identity Management

Use a central identity system where possible. This makes it easier to manage users, groups, roles, policies, and authentication requirements across the organization.

2. Enforce Multi-Factor Authentication

MFA should be required for:

• Remote access
• Privileged accounts
• Administrative consoles
• Sensitive business applications
• Cloud management portals

MFA does not eliminate identity risk, but it significantly strengthens authentication.

3. Apply Least Privilege

Start with minimum access and expand only when there is a valid business need.

Avoid giving broad access by default.

4. Review Access Regularly

Access should be reviewed periodically, especially for:

• Privileged users
• Critical applications
• Cloud roles
• Service accounts
• Contractors
• External users
• High-risk groups

5. Remove Access Quickly During Offboarding

When an employee, contractor, or partner no longer needs access, accounts and permissions should be disabled or removed quickly.

Delayed offboarding is one of the most common IAM weaknesses.

6. Separate Standard and Administrative Accounts

Administrators should not use highly privileged accounts for daily activities such as email, browsing, or routine business tasks.

Separate admin accounts reduce exposure.

7. Avoid Shared Accounts

Each user should have their own identity.

Shared accounts should be avoided because they reduce accountability and make investigations harder.

8. Monitor Identity Relationships

IAM is not only about individual permissions. Risk often comes from relationships between identities, groups, roles, systems, and privileges.

For example, a normal user may indirectly gain privileged access through nested groups, delegated permissions, misconfigured roles, or connected systems.

9. Manage Non-Human Identities

Organizations should track and govern:

• Service accounts
• API keys
• Application identities
• Automation accounts
• Machine identities
• Workload identities
• AI agent identities

Each non-human identity should have a clear owner, purpose, permission scope, and lifecycle.

10. Connect IAM with Identity Security

IAM defines and manages access. Identity security validates whether that access creates real risk.

A mature program should not only ask:

"Who has access?"

It should also ask:

"Can this access be abused by an attacker?"

IAM vs Identity Security

IAM and identity security are closely related, but they are not the same.

IAM focuses on managing identities and access.

Identity security focuses on identifying and reducing the security risks created by those identities and access paths.

For example:

IAM may show that a user belongs to a group.

Identity security asks:

• Does this group membership create a path to critical systems?
• Can this user escalate privileges?
• Is this access still needed?
• Is there a toxic combination of permissions?
• Could an attacker abuse this relationship?

This difference is important because an organization can have IAM tools in place and still have serious identity security risks.

How Forestall Helps

Forestall helps organizations move beyond basic access management by identifying real identity security risks across complex environments. Instead of only listing who has access to what, Forestall analyzes identity relationships, privilege paths, misconfigurations, exposed credentials, excessive permissions, and hidden attack paths that attackers could abuse.

With Forestall, security teams can better understand their identity attack surface, prioritize the most critical risks, and reduce the likelihood of identity-based compromise before attackers exploit it.

Practical IAM Checklist

Use this beginner checklist to evaluate IAM maturity:

• Are all users uniquely identified?
• Is MFA enabled for remote and privileged access?
• Are privileged accounts separated from daily-use accounts?
• Are access rights based on least privilege?
• Are access reviews performed regularly?
• Are former employee accounts disabled quickly?
• Are contractor accounts time-limited?
• Are shared accounts avoided?
• Are service accounts reviewed and owned?
• Are cloud roles and permissions monitored?
• Are high-risk identity paths analyzed?
• Are identity-related risks mapped to business-critical assets?

Frequently Asked Questions

What does IAM stand for?

IAM stands for Identity and Access Management.

What is the main purpose of IAM?

The main purpose of IAM is to ensure that the right identities have the right access to the right resources at the right time.

Is IAM only for employees?

No. IAM applies to employees, contractors, partners, administrators, applications, service accounts, workloads, devices, APIs, and AI agents.

What is the difference between IAM and PAM?

IAM manages identities and access broadly across the organization. PAM, or Privileged Access Management, focuses specifically on high-risk privileged accounts and administrative access.

What is the biggest IAM risk?

One of the biggest IAM risks is excessive privilege. When users or systems have more access than they need, a compromised identity can cause much greater damage.

Why is IAM important for cybersecurity?

IAM is important because identities are often the path attackers use to access systems, escalate privileges, and move across environments. Strong IAM reduces the chance that stolen or misused credentials can lead to major compromise.

Conclusion

Identity and Access Management is one of the foundations of modern cybersecurity. It helps organizations control who can access systems, what they can do, and when access should be changed or removed.

But IAM alone is not enough. As environments become more complex, organizations also need to understand identity risk, privilege relationships, non-human identities, and attack paths.

A strong IAM program should be combined with identity security practices that continuously identify, prioritize, and reduce the risks attackers are most likely to exploit.