# access control

> selective restriction of access to a place or other resource, allowing only authorized users

**Wikidata**: [Q228502](https://www.wikidata.org/wiki/Q228502)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Access_control)  
**Source**: https://4ort.xyz/entity/access-control

## Summary
Access control is the selective restriction of access to a place or other resource, allowing only authorized users. It is a fundamental method in computer security and physical security, implemented through various mechanisms like fingerprint scanners, keypads, and authorization systems.

## Key Facts
- Access control is a method and computer security model that enforces security policies.
- It is part of information technology and has the goal of controlling access.
- Common implementations include fingerprint scanners, keypads, and authorization systems.
- Access control is distinct from authorization, which involves verifying user permissions.
- It is classified under security systems and technical activities.
- Access control systems are used in both physical and digital environments.
- The concept is formalized in security engineering literature, such as *Security Engineering: A Guide to Building Dependable Distributed Systems*.

## FAQs
### Q: What are the main components of an access control system?
A: Access control systems typically include authentication mechanisms (like fingerprint scanners or keypads), authorization processes, and enforcement mechanisms to restrict access to authorized users only.

### Q: How does access control differ from authorization?
A: Access control is the broader system that restricts access, while authorization is the process of verifying whether a user has the necessary permissions to access a resource.

### Q: What industries commonly use access control systems?
A: Access control is widely used in information technology, physical security, and various organizational settings to protect sensitive resources and locations.

### Q: Can access control be implemented in both physical and digital environments?
A: Yes, access control systems are used in both physical security (e.g., secure facilities) and digital security (e.g., computer networks and data systems).

### Q: What is the role of a computer security model in access control?
A: A computer security model provides a formal framework for specifying and enforcing security policies, ensuring that access control mechanisms are both effective and secure.

## Why It Matters
Access control is essential for protecting sensitive information, physical spaces, and digital systems from unauthorized access. It ensures that only authorized users can interact with resources, preventing data breaches, theft, and other security incidents. In the digital realm, access control is critical for maintaining the integrity and confidentiality of data, while in physical security, it safeguards facilities and assets. By implementing robust access control systems, organizations can mitigate risks, comply with regulatory requirements, and maintain trust with their users and stakeholders. The principles of access control are foundational in security engineering, influencing the design of systems that require controlled access to sensitive information.

## Notable For
- Access control is a core component of computer security models, providing a structured approach to enforcing security policies.
- It is implemented using various technologies, including fingerprint scanners and keypads, to ensure secure and efficient access management.
- Access control systems are used in both physical and digital environments, demonstrating their versatility and broad applicability.
- The concept is formalized in security engineering literature, such as *Security Engineering: A Guide to Building Dependable Distributed Systems*, highlighting its importance in the field.
- Access control is distinct from authorization, emphasizing its role in both verifying permissions and restricting access to authorized users only.

## Body
### Definition and Scope
Access control is the selective restriction of access to a place or other resource, allowing only authorized users. It is a method and computer security model that enforces security policies to ensure that access is granted only to those with the necessary permissions.

### Implementation and Technologies
Access control systems are implemented using various technologies, including fingerprint scanners, keypads, and authorization mechanisms. These technologies work together to authenticate users and enforce access restrictions, ensuring that only authorized individuals can access protected resources.

### Applications
Access control is widely used in both physical and digital environments. In physical security, it safeguards facilities and assets, while in digital security, it protects data and systems from unauthorized access. The principles of access control are foundational in security engineering, influencing the design of systems that require controlled access to sensitive information.

### Relationship to Authorization
Access control is distinct from authorization, which involves verifying whether a user has the necessary permissions to access a resource. While authorization focuses on permission verification, access control encompasses the broader system of restricting access to authorized users only.

### Formalization and Standards
The concept of access control is formalized in security engineering literature, such as *Security Engineering: A Guide to Building Dependable Distributed Systems*. These standards provide a framework for specifying and enforcing security policies, ensuring that access control mechanisms are both effective and secure.

### Impact and Significance
Access control plays a critical role in maintaining the integrity and confidentiality of sensitive information. By implementing robust access control systems, organizations can mitigate risks, comply with regulatory requirements, and maintain trust with their users and stakeholders. The principles of access control are essential in the design of secure systems, ensuring that access is controlled and monitored effectively.

## References

1. [Source](https://lingualibre.org/wiki/Q797142)
2. Freebase Data Dumps. 2013
3. Quora
4. National Library of Israel
5. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
6. Wikibase TDKIV