Time-Based Access Control Structure for Dynamic Resource Permissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern computer systems lack the ability to control access to resources based on time, as existing access control systems, such as the UNIX file system, provide constant permissions without temporal considerations.
Innovation Solution
Implementing a time-based access control structure that associates user identifiers with specific access levels and time/date permissions, allowing access to resources based on current time and date, using a clock to determine the appropriate access level for users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If constant access permissions are provided (as in UNIX file system), then access control is simple to implement, but the system cannot control access based on time
Solution Approach 1:
The access control structure is segmented into multiple access control entries, each associated with different time periods. Each entry contains independent permission settings for specific time ranges, allowing the system to evaluate which entry applies based on the current time. This segmentation enables temporal access control while maintaining manageable complexity through modular organization.
Solution Approach 2:
The access control structure transitions from static constant permissions to dynamic time-based permissions. The system automatically adjusts access rights based on the current time by selecting the appropriate access control entry, making the permissions adaptive to temporal conditions without requiring complex manual reconfiguration.
2Reliability
If time-based access control is implemented, then access security is enhanced, but the access control structure becomes more complex
Solution Approach 1:
Access control entries are pre-configured with specific time periods and permission levels before runtime. The system performs preliminary setup of time-based rules, so that during operation it only needs to compare the current time against predefined ranges. This preliminary action enhances security through comprehensive time-based controls while minimizing runtime complexity.
Solution Approach 2:
The access control structure acts as an intermediary layer between users and resources, inserting time-based evaluation logic into the access control flow. This intermediary mechanism automatically filters access requests based on temporal conditions, enhancing security without requiring complex changes to the underlying file system or application logic.
3Adaptability or versatility
If multiple access control entries with different time periods are maintained, then flexible temporal access control is achieved, but the quantity of access control data increases
Solution Approach 1:
The access control structure is designed to serve multiple functions: it stores permission data, manages time periods, performs time comparison, and controls access decisions. By consolidating these functions into a unified multi-functional structure, the system achieves flexible temporal access control without proportionally increasing data volume, as the same structure handles both storage and evaluation operations.
Data Source
AI summary
Upon receiving a request for access to a resource, a current clock value is determined. Based on information including the resource, the identity of the user requesting the access, and the current clock value, the system identifies applicable access controls. If the applicable access controls indicate that the user can be granted access to the resource at the current time, the request is granted. Otherwise, the request is denied.