The FREE Cybersecurity Glossary by Thor Pedersen!

Acceptance (As Related to Risk) Or Accepting Risk: Acceptance of risk refers to the decision to tolerate a risk without taking any mitigating actions, typically because the cost of mitigation exceeds the benefits. It is one of the four main risk management strategies: Treat (Mitigate), Transfer, Tolerate (Accept), and Terminate (Avoid).

Access: In the context of IT and cybersecurity, access refers to the permission or ability to enter or use a system, network, resource, or data. Managing access involves authenticating users to confirm their identity and authorizing them to interact with certain information or functionalities based on their roles, responsibilities, and established security policies. Access controls are put in place to prevent unauthorized individuals from gaining entry to sensitive systems or information, thereby protecting the confidentiality, integrity, and availability of data. Access can be categorized into physical access, which pertains to entering facilities, and logical access, related to using computer networks, systems, and data.

Access Control: Refers to the systematic regulation of the ability of authenticated users to view, use, or alter resources. This procedure safeguards sensitive data from unauthorized access, protects system integrity, and prevents potential disruptions. It includes techniques such as role-based access control (RBAC), discretionary access control (DAC), and mandatory access control (MAC), which decide the level of user access based on assigned roles, user discretion, and adherence to policies, respectively.

Access Control List (ACL): A table or database that keeps track of the permissions attached to an object, such as a file directory or a network interface. The ACL specifies which users or system processes are granted access to objects, as well as what operations are allowed on given objects. It is a key concept in file permissions, network security, and database management, where it is critical to maintain the right balance between security and usability.

Access Control Matrix: A two-dimensional table used to implement an access control policy within a system. In this matrix, the rows represent subjects (like users or processes), and the columns represent objects (like files, directories, or devices). The intersection of a row and a column indicates the access rights that the subject has over the object. It offers a comprehensive view of the access rights within a system, assisting in the design, implementation, and auditing of access control policies.

Access Control Mechanism: A process or system that manages access to resources within a system by enforcing policies and rules. These mechanisms often involve elements of identification, authentication, authorization, and accountability. They are integral to maintaining the security of a system by ensuring that only properly authenticated and authorized users gain access to the resources they require and no more.