Identity and Access Management: protecting identities in cybersecurity

What is Identity and Access Management

Identity and Access Management (IAM) is the set of processes, technologies, and policies that enables the structured and secure administration of digital identities and their access rights to systems, applications, cloud environments, and data.

In practice, IAM establishes who can access what, under which conditions, and with which privileges, ensuring that access to digital resources is granted only to authorized users, devices, or services. It is therefore not limited to “password management”, but centrally governs identities, authentication, authorization, and access control.

In a context where organizations operate on increasingly distributed and interconnected infrastructures, IAM is a fundamental pillar of cybersecurity. It protects systems and sensitive information while ensuring consistency and traceability in access management, reducing errors and excessive privileges.

An effective IAM system makes it possible to:

• uniquely identify users, devices, and services;
• apply consistent authentication mechanisms (passwords, tokens, certificates, biometrics, multi-factor authentication);
• assign privileges based on role and operating context;
• monitor and track activities to understand who accesses what, when, and under which conditions.

In a complex organization, this means, for example, allowing an administrative employee to access accounting systems while preventing access to development platforms or infrastructure systems. Access security thus becomes a structured process, not an individual responsibility.

Digital identities, credentials, and access privileges

Digital identities are the starting point of every IAM architecture: they are the set of information that makes it possible to uniquely recognize a subject or entity within a digital ecosystem.

They may refer to:

• internal users (employees, system administrators, or technical operators);
• external users (partners, consultants, suppliers, or temporary collaborators);
• applications and services, which communicate with one another through APIs or automated mechanisms;
• connected devices (company laptops, smartphones, sensors, IoT gateways, or field equipment).

Each identity is associated with two fundamental components:

• authentication credentials, which verify the identity;
• access privileges, which define what it can do.

Structured management of these elements makes it possible to:

• Reduce the risk of improper access or access inconsistent with the role: when permissions are assigned in a structured way, the likelihood that a user obtains unnecessary or excessive access decreases.
• Increase visibility over actual access to systems: organizations can know which identities are active, which applications they use, and with which authorizations they operate.
• Improve traceability and audit capability: in the event of an incident, anomaly, or internal review, it is easier to reconstruct the activities performed and identify any deviations.
• Simplify governance throughout the user lifecycle: creation, modification, and revocation of access become more orderly and faster processes, less exposed to manual errors.

For example, an IT technician may have administrative privileges on certain servers, but not necessarily on HR systems; an external consultant may access only one portal for a limited period; a monitoring application may read telemetry data without being able to modify it. Proper separation between identity, authentication, and authorization is one of the cornerstones of IAM.

Why has IAM become central to cybersecurity?

Identity and Access Management has become central to cybersecurity because identity management is one of the most critical points of the entire digital ecosystem.

In most organizations, users, applications, devices, and services access multiple internal and external systems every day, often distributed across data centers, cloud environments, hybrid environments, and operational infrastructure. In this scenario, the ability to rigorously control who accesses resources and with which privileges has become an essential condition for security.

The main reasons are:

• Identities are the new security perimeter. With cloud and remote work, protection is no longer focused only on the network, but on accounts and access mechanisms.
• Credentials are among the main attack vectors. Phishing, password theft, and the use of compromised accounts make it possible to simulate legitimate access.
• The complexity of digital environments requires centralized control. Organizations no longer operate on a few homogeneous systems, but on a mosaic of SaaS applications, cloud platforms, internal tools, APIs, and connected devices. Without IAM, access management becomes fragmented, creating inconsistencies and uncontrolled privileges.
• Access must be governed throughout the entire identity lifecycle. An identity is not static: it is created, evolves, changes role, acquires new permissions, and is eventually deactivated. Without structured lifecycle management, accounts that are no longer needed, obsolete credentials, or authorizations incompatible with the user’s actual role can easily remain active.
• Access security impacts continuity and resilience. Improper access can compromise critical systems and operational processes.
• Compliance, audits, and accountability require precise traceability. It is necessary to know who accessed what and under which conditions.

In summary, IAM has become central not only because it helps “block” unauthorized access, but because it enables systematic governance of the relationship between digital identities, operational processes, and the protection of critical resources.

The increase in digital access and attack surfaces

The increase in digital access is one of the factors that has made protecting IT environments more complex. Today, users access company resources from different locations, with different devices, and through applications that may be on-premise, in the cloud, or in hybrid environments.

This evolution has significantly expanded the attack surface, meaning the set of points through which a subject may attempt to gain access to systems and information.

The main causes are:

• spread of remote and hybrid work;
• growth of cloud services and SaaS applications;
• increase in connected devices;
• greater interaction with external parties.

An IAM system introduces uniform rules and contextual controls. It can, for example, apply additional checks for access from unmanaged devices, unusual countries, or anomalous times.

If a user usually accesses from Milan during working hours, an attempt from another country a few minutes later can trigger additional checks or blocks. This approach reduces the risk of fraudulent use of credentials.

Impact of unauthorized access on data and critical systems

Unauthorized access is one of the main threats to digital security, because it can affect data, systems, processes, and corporate reputation at the same time. When a subject obtains privileges they should not have, the problem is not only the breach of a rule: it can result in concrete operational compromise.

The most frequent impacts include:

• Exposure of sensitive or confidential data: commercial information, personal data, technical documentation, or system credentials may be viewed, copied, or stolen.
• Unauthorized alteration of configurations and processes: an account with high privileges can modify settings, delete information, or change parameters essential to the proper functioning of systems.
• Interruption of operational continuity: if improper access affects critical systems, the incident can generate slowdowns, service outages, or unavailability of essential functions.
• Economic and reputational damage: in addition to incident response costs, the organization may suffer reputational effects, loss of trust, and impacts on relationships with customers, partners, and stakeholders.

If an administrative account is compromised, an attacker can not only access data, but also create new users, modify permissions, disable security controls, or move laterally towards other systems. This is why privilege management is a central element of IAM strategy.

How does an Identity and Access Management system work?

An Identity and Access Management system centrally governs the identity lifecycle and access mechanisms to resources, replacing fragmented management with a structured and verifiable model.

It operates across four main dimensions:

• Identification: every subject or entity that interacts with systems must be recognized as a distinct identity within the organization.
• Authentication: once the identity has been declared, the system verifies that it is authentic through appropriate credentials or verification factors.
• Authorization: after authentication, rules are applied to establish which resources are accessible and with which privileges.
• Accounting and tracking: access activities are recorded for monitoring, audit, control, and investigation purposes.

In practice, an IAM system makes it possible to:

• create identities during onboarding;
• assign roles and permissions;
• automatically update access in the event of changes;
• revoke access when no longer needed;
• maintain evidence of activities.

For example, when a new person joins the company, the IAM system can automatically create the account, assign them to an organizational group, enable the necessary applications, and apply appropriate authentication controls. If that person later changes function, privileges can be updated consistently without having to intervene manually on each individual system.

Principle of least privilege

The principle of least privilege provides that each identity has only the permissions needed to carry out its activities. It is one of the cornerstones of access security, because it reduces risk exposure both in the event of human error and in the event of account compromise.

The main benefits of this approach are:

• Reduction of the internal attack surface: fewer unnecessary privileges mean fewer opportunities for abuse or improper use of authorizations.
• Containment of the impact of potential compromises: if an account with limited permissions is breached, the attacker will have a reduced scope of action compared with an account with extensive privileges.
• Improvement of access governance: roles are clearer, more consistent, and easier to verify during audits or periodic reviews.

Identity lifecycle management

Identity lifecycle management concerns all the phases through which user access passes within an organization:

• Onboarding: creation and activation of access.
• Modification or internal mobility: updating permissions in the event of a change in role, responsibilities, or organizational structure.
• Suspension or temporary access: management of prolonged absences, fixed-term consulting engagements, or exceptional access.
• Offboarding: deactivation or revocation of access at the end of the relationship or operational need.

A widespread critical issue is the presence of residual privileges, meaning authorizations that remain active even when they are no longer consistent with the actual role. This happens, for example, when an employee changes function but retains previous access, or when an external account is not deactivated.

Identity and Access Management (IAM) solutions make it possible to prevent these situations by automating and making the management of changes more reliable throughout the entire identity lifecycle.

IAM and prevention of cyber threats

Identity and Access Management plays a central role in preventing cyber threats because it acts on one of the points most exploited by attacks: the abuse of digital identity. Many attacks do not begin with the breach of a firewall or the exploitation of a complex vulnerability, but with the theft or misuse of legitimate credentials.

An IAM system contributes to prevention through several mechanisms:

• Multi-factor authentication: the adoption of multiple verification factors reduces dependence on passwords alone and makes fraudulent access more difficult.
• Granular access controls: permissions are defined precisely, limiting the possibility that a user operates outside their authorized perimeter.
• Contextual and adaptive policies: the system can evaluate variables such as location, device, time of day, or risk level to determine whether to allow, limit, or block access.
• Continuous monitoring of activities: access and behavior are observed to identify anomalous patterns or deviations from expected operations.
• Reduction of privileges and segregation of roles: separation between functions and responsibilities reduces the likelihood that a single account can perform unsupervised critical actions.

Example: a user correctly enters their username and password, but tries to access from an unregistered device and from a geographic area never used before. In the presence of an advanced IAM system, access can be made subject to an additional verification factor, limited to consultation-only functions, or blocked altogether. In this sense, IAM does not merely “grant” or “deny” access, but helps build a dynamic defense logic.

How to adopt an effective IAM strategy?

Adopting an effective IAM strategy requires a progressive, structured approach consistent with the organization’s risk profile. Introducing a technology platform is not enough: it is necessary to define an access governance model that brings together organizational, technological, and procedural aspects.

The fundamental steps are:

1. Map identities, systems, and resources to be protected: before designing effective controls, it is necessary to know which identities exist, which systems they use, and which data or functions they need to reach.
2. Define roles, responsibilities, and authorization criteria: access rights must be linked to clear organizational roles, avoiding random or overly personalized assignments.
3. Introduce consistent criteria for authentication and authorization: not all resources have the same level of criticality. For this reason, it is useful to scale controls according to risk, strengthening protection for the most sensitive access points.
4. Automate the identity lifecycle as much as possible: onboarding, permission changes, and offboarding should take place through structured workflows, in order to reduce errors, delays, and misalignments.
5. Provide for periodic access reviews: access should not be considered definitive. It is necessary to periodically verify its consistency, necessity, and adequacy.
6. Integrate IAM with the existing technology ecosystem: the value of IAM increases when it communicates with corporate directories, HR systems, cloud applications, security tools, and monitoring platforms.

An organization may, for example, start by bringing privileged accounts under control, introducing multi-factor authentication and periodic review of administrative permissions. At a later stage, it can extend the model to application access, external suppliers, and cloud environments. This gradual approach makes it possible to increase IAM maturity over time without compromising operations.

Ultimately, an effective IAM strategy is not only a technical measure for protecting access. It is a structural component of modern cybersecurity, because it makes it possible to govern digital identity in an orderly way as a critical factor for security, operational continuity, and organizational resilience.