Reconfigurable Circuit Image Validation for Secure FPGA Sharing
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Solution Overview
Problem
In datacenters where reconfigurable circuits like FPGAs are shared among multiple clients, there is a risk of data and hardware harm due to malicious reconfiguration, leading to potential data theft and hardware damage from repetitive tasks causing overheating.
Innovation Solution
Implementing a reconfigurable device with user and image policies to control reconfigurations, using reconfiguration logic that validates user entities and images, providing virtualized reconfiguration to ensure secure and separate configuration for each user entity, thereby reducing the risk of harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reconfigurable circuits are shared among multiple clients, then resource utilization improves, but security and reliability deteriorate due to malicious reconfiguration risks
Solution Approach 1:
The patent segments the reconfigurable device into multiple isolated configuration spaces, where each user entity receives a dedicated configuration image that can only be applied to their assigned portion of the device. This prevents a user from loading malicious configurations that could affect other users or the entire device, thus maintaining security while enabling shared resource utilization.
Solution Approach 2:
The patent introduces a configuration manager as an intermediary component that validates configuration images before they are applied to the reconfigurable device. The configuration manager enforces policies to ensure only authorized configurations from authenticated user entities are loaded, acting as a security gatekeeper between users and the shared hardware resource.
2Reliability
If reconfiguration validation is implemented, then security improves, but device complexity increases
Solution Approach 1:
The patent implements preliminary validation of configuration images during the configuration phase, before they are applied to the reconfigurable device. The configuration manager checks user authentication, verifies configuration integrity, and ensures policy compliance in advance, preventing malicious configurations from reaching the device and simplifying runtime security management.
Data Source
AI summary
A device includes a reconfigurable circuit and reconfiguration logic. The reconfiguration logic is to: receive, via a policy interface, a user policy and an image policy; receive a first reconfiguration image via a first configuration interface of a plurality of configuration interfaces; validate the first configuration interface based on the user policy; validate the first reconfiguration image based on the image policy; and in response to a determination that the first configuration interface and the first reconfiguration image are both valid, reconfigure the reconfigurable circuit using the first reconfiguration image.