The moment a security incident occurs, the first question is: who had access? This is followed by what was accessed, from where it was accessed, how much was accessed and exposed, etc.
As organizations migrate to cloud services and adopt AI-driven technologies, managing access controls isn’t just a best practice; it's a business imperative and a core regulatory requirement. Understanding access control is critical to ensuring sensitive data security and building a robust data security posture to combat evolving threats.
What is Access Control?
IBM defines access controls as the policies, tools, and processes that govern user access to sensitive data, computer systems, locations, and other resources.
As organizations increasingly embrace cloud services, migrate data from one ecosystem to another, and allow personnel to access critical data from multiple regions, it is imperative to secure the data pipeline and regulate who can access sensitive data and systems.
Whether it’s an employee, a third-party, an integrated application, or any other system that accesses data, improper data management can result in inadvertent data exposure, compromising sensitive data's confidentiality, integrity, and availability.
This is where access control plays a pivotal role in governing access and enabling organizations to assign who (individuals) or what (applications, systems, etc.) can access specific data and resources, under what circumstances, and what actions they are allowed to perform.
How Does Access Control Work?
At its core, access control is about identity management: authorized individuals, systems, and applications are validated before they’re permitted to access a requested resource.
Even though organizations across industries have their own access mechanisms in place, a typical access control workflow is as follows:
A. Identification
To obtain access to a resource, the authorized user or system initiates an access request. The access request includes the identity of the user who’s been granted access to the resource. This could include login credentials such as usernames, email addresses, and passwords, as well as biometric information such as facial recognition or fingerprints.
B. Authentication
Once identified, the access control system begins the verification process, which authenticates the identity provided against a registered database containing details of the individual or the system that initiated the access request.
C. Authorization
After the identity is successfully authenticated, the access control system assesses the access permissions and privileges granted to the individual or the system that requested access. Entitlements could be based on role in the organization, level of security clearance, location from where resources can be accessed, etc.
D. Monitoring and Auditing
Access requests don’t go unnoticed. A central database logs the entire access journey, providing visibility into login requests, successful and failed logins, privileges utilized, any policy violations, etc. This helps compliance teams monitor for suspicious activity and enforce security policies.
Types of Access Control
There’s no one-size-fits-all approach to access control. Based on the security required and access requirements, organizations adopt various access control models. These include:
A. Role-Based Access Control (RBAC)
One of the most common access control models, RBAC, assigns access permissions to individuals and systems based on their organizational role. For example, an HR Manager will be permitted to access comprehensive employee information, including records, pay, and benefits. Similarly, the same RBAC concept applies to other teams and personnel.
RBACs are scalable, meaning that when an individual or system upgrades to a new position or downgrades to a previous set of permissions, administrators can swiftly update their role-based access privileges, simplifying access to resources without manually modifying permissions.
B. Discretionary Access Control (DAC)
DAC is another common access control mechanism where the resource owner determines who or which systems can access a resource and what access permissions they receive. This is most common for collaborative work, such as documents, where the resource owner provides edit access to some while read-only access to others. Compared to RBAC, DAC is easier to manage and provides a flexible access structure that allows resource owners to access resources directly, without involving a dedicated administrator.
C. Attribute-Based Access Control (ABAC)
Instead of relying on an individual’s role, ABAC provides or denies access based on attributes such as the user’s job title, the department they belong to, the device and location from which they’re trying to obtain access, the time of day, etc. For example, an organization may implement ABAC, enabling certain employees to access their department-specific data during business hours on company-managed devices.
D. Mandatory Access Control (MAC)
Of all the access control models, MAC is by far the strictest. This is where users have no control over permissions, and only a central security authority is authorized to enforce permissions. This access control model is frequently used for highly sensitive data and top-secret projects where there’s no room for error, such as government agencies, military organizations, and highly regulated industries.
Components of Access Control
Access control systems are built on several components that together form a robust access control model. These interconnected components are as follows:
A. Identity Management
Identity management defines a user’s identity before granting access to resources. This is typically done by entering credentials such as a username, email address, and password. These identities are maintained in a secure database through which multiple stakeholders, such as employees and third parties, can enter their details and obtain access.
B. Authentication
No identity is simply given access without authentication. This process ensures identities requesting access are indeed who they claim to be. The system verifies this by requiring a password, biometric identification (if enabled), PIN, or a one-time password.
C. Authorization
Once identities are authenticated, the system verifies the user’s access privileges. These permissions could be based on the user’s role within the organization and the permitted access to specified resources.
D. Access Enforcement
Based on the organization’s access policies and enforcement mechanisms, the system grants or denies access to the user. It does so by ensuring the access permissions are applied correctly.
E. Audit Logs and Continuous Monitoring
A crucial component that maintains access logs, providing administrators with visibility into who is accessing what. This helps manage secure incidents and ensure regulatory compliance. Additionally, systems must be continuously monitored for suspicious activities, misuse of privileges, and other potential threats.
Difference Between Authentication And Authorization
Although authentication and authorization can often be considered the same, they’re far from being the same. This is primarily because authentication and authorization serve different purposes that are crucial to access control.
Authentication
|
Authorization
|
| Verifies the identity of a user or system. |
Determines what an authenticated user is allowed to access or perform. |
| Takes place before authorization. |
Takes place after successful authentication. |
| Answers the question, ‘Who are you?’ |
Answers the question, ‘What are you allowed to do?’ |
| Uses methods such as passwords, multi-factor authentication (MFA), biometrics, digital certificates, or single sign-on (SSO). |
Uses roles, permissions, security policies, attributes, and access rules to grant or deny access. |
| Is required for every user attempting to access the system. |
Is evaluated only after the user's identity has been verified. |
| Prevents unauthorized users from accessing the system. |
Prevents authenticated users from accessing resources beyond their assigned privileges. |
| Example: An individual gains access to an organization’s private portal by using their username, password, and MFA. |
Example: The same individual can view only HR-related records, as their job role and designation permit them to access only HR material. |
Importance of Access Control in Regulatory Compliance
Ensuring regulatory compliance is nonnegotiable. Data privacy laws mandate strict security controls and requirements for organizations that handle sensitive data. There’s no real control over data assets and entitlements without access control.
A. PCI DSS
The Payment Card Industry Data Security Standard (PCI DSS) requires organizations handling payment card information to implement strict access control through the principle of least privilege, unique user IDs, and multi-factor authentication (MFA) to ensure only authorized personnel can reach cardholder data. By doing so, organizations can minimize the risk of payment fraud.
B. HIPAA
The Health Insurance Portability and Accountability Act (HIPAA) requires healthcare organizations to secure their electronic protected health information (ePHI). HIPAA’s Security Rule outlines access control requirements, requiring a regulated entity to implement technical policies and procedures for its electronic information systems that maintain ePHI, allowing only authorized persons to access it. This is in addition to several other requirements, such as audit controls, authentication, and ensuring transmission security.
C. GDPR
The General Data Protection Regulation’s Article 32 sets out security requirements for processing, requiring organizations to use technical and organizational measures, such as limiting access to files, to keep personal data safe and private.
D. CCPA/CPRA
The CCPA and CPRA require organizations to implement reasonable security measures, including strict access controls, to protect consumers' personal and sensitive data from unauthorized access or breaches. Failing to maintain proper access controls can lead to statutory damages and private lawsuits if a data leak occurs.
Simplify Access Control Across Your Enterprise
Access control is one of the core pillars of forming a robust cybersecurity posture. It's built on the principle of restricting resource access to authorized users, systems, applications, and devices, minimizing the blast radius, inadvertent data exposure, and data breaches.
As organizations increasingly adopt cloud services and embed AI into everyday operations, legacy security models are unable to keep pace with the complex, interconnected digital ecosystems they support. Organizations require a robust data security posture that goes beyond traditional data perimeter-based defenses to protect sensitive data wherever it resides.
Securiti enables organizations to take control of their data security by enabling intelligent access governance, policy enforcement, and continuous visibility across cloud, SaaS, and on-premises environments. Securiti DataAI Command Platform empowers businesses to safeguard sensitive information while ensuring authorized access, regardless of where data resides.
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