Secure Guest Account Isolation via Namespace Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current operating systems do not provide secure guest accounts with separate execution environments, leading to shared resource access and vulnerability to malicious attacks, as they lack the ability to isolate user environments and control access to network ports and applications.
Innovation Solution
A secure guest account module is implemented within a multi-user secure operating system, utilizing SELinux to enforce access rules, allowing controlled access to network ports and applications while preventing unauthorized access, and ensuring a clean environment by erasing user-created files and directories upon logout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If guest accounts share the same execution environment, then system complexity is reduced, but simultaneous program execution is prohibited and security is compromised
Solution Approach 1:
The patent divides the execution environment into separate namespaces for each guest user. Each namespace includes isolated file systems, process spaces, and network stacks, allowing multiple guest users to execute programs simultaneously without interfering with each other. This segmentation resolves the contradiction by enabling both multiple simultaneous executions and maintained security isolation.
Solution Approach 2:
The patent implements nested virtualization where guest user namespaces are contained within the host system namespace. Each guest namespace is a self-contained environment that can be created, managed, and destroyed independently while remaining part of the overall system hierarchy. This nesting approach allows complex isolated environments without requiring complete system redesign.
2Ease of operation
If guest accounts are allowed without separate execution environments, then ease of operation is improved, but vulnerability to malicious attacks increases
Solution Approach 1:
The patent introduces namespace isolation as an intermediary layer between guest users and the host system resources. This intermediary enforces access control policies, preventing malicious guest users from directly accessing or affecting host system resources while still allowing legitimate operations. The namespace mechanism mediates all resource access requests, blocking harmful actions while permitting useful ones.
Solution Approach 2:
The patent applies different security and access control characteristics to different parts of the system. Guest user namespaces have restricted permissions for sensitive operations (network access, file system access, process management) while maintaining full functionality for their intended purposes. This local differentiation of access rights allows ease of operation for legitimate tasks while preventing malicious attacks through targeted restrictions.
3Device complexity
If multiple guest accounts share resources, then device complexity is reduced, but productivity decreases due to inability to execute multiple programs simultaneously
Solution Approach 1:
The patent segments the system into multiple independent guest namespaces, each capable of running its own set of programs simultaneously. This segmentation allows parallel execution of multiple guest user workloads without requiring complex inter-process communication or resource sharing mechanisms, thereby improving productivity while maintaining manageable system complexity through clear namespace boundaries.
Data Source
AI summary
An embodiment relates generally to a method of creating a secure environment in a computer device. The method includes providing a secure guest account in a multi-user operating system and enforcing a policy on the secure account to allow a user to log-in to the secure guest account while preventing access at least one network port of the computer device. The method also includes enforcing a rule to allow the secure guest account access to an application and the at least one network port.