Container Attestation via Kernel Module Policy Enforcement
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Solution Overview
Problem
Container workloads pose security risks due to potential malware and vulnerabilities, as they share the same operating system kernel and may not be adequately authenticated, leading to compromised client platforms and data exposure.
Innovation Solution
Implementing container attestation methods that verify signed claims about container workloads against an owner's policy, enforcing resource constraints, and normalizing resource descriptions to ensure secure execution on client platforms, thereby controlling what technologies can be used and ensuring trust domain extensions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If container workloads share the same operating system kernel for efficiency, then resource utilization improves, but security risks increase due to potential malware and vulnerabilities
Solution Approach 1:
The patent segments the kernel execution environment into isolated measurement domains using virtualization extensions (e.g., Intel TDX, AMD SEV). Each container workload is measured and verified in its own isolated domain, allowing multiple containers to share the kernel while maintaining individual security boundaries. This enables both high resource utilization and enhanced security through cryptographic isolation.
Solution Approach 2:
The patent introduces a kernel module acting as an intermediary between container workloads and the host kernel. This module performs attestation measurements, verifies container integrity, and enforces security policies. The intermediary enables secure container execution by mediating access controls and providing cryptographic verification without compromising kernel sharing efficiency.
2Reliability
If container workloads are verified against owner policy with resource constraints, then security is enhanced, but system complexity increases
Solution Approach 1:
The patent implements a universal attestation framework that handles multiple container workloads through a common verification mechanism. The kernel module provides multi-functional capabilities including measurement, verification, policy enforcement, and resource constraint management within a single integrated system. This universal approach enhances security while avoiding the complexity of separate verification systems for each container.
Solution Approach 2:
The patent changes the verification parameters from complex policy evaluation to simplified cryptographic measurement comparison. By using fixed measurement values and standardized policy formats, the system achieves high security verification with reduced complexity. The resource constraints are expressed as standardized parameters that simplify the verification process while maintaining granular control.
3Reliability
If signature verification and policy matching are performed for container attestation, then authentication reliability improves, but processing time increases
Solution Approach 1:
The patent performs preliminary attestation measurements during container initialization and image loading, before the container workload executes. The kernel module captures measurement values early in the container lifecycle and stores them for verification. This preliminary action enables fast authentication during runtime by comparing pre-captured measurements against policy, reducing processing time while maintaining high authentication reliability.
Data Source
AI summary
Methods, apparatus, and systems are disclosed for container attestation in client-based workloads. An example apparatus includes at least one memory, machine readable instructions, and processor circuitry to at least one of instantiate or execute the machine readable instructions to access a container attestation and an owner policy, the container attestation including a first signature and the owner policy including a second signature, determine that the first signature and the second signature are valid, iterate through configuration sets of the owner policy to identify a match between a claim of the container attestation and a configuration set, identify a resource constraint associated with the configuration set, and generate a resource description based on the resource constraint, the resource description to determine execution of a container workload on a client-based platform.