Stateless Packet Segmentation for Cloud Security
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Solution Overview
Problem
In cloud computing environments, users with native access to hardware resources face risks of modifying firmware or configuration settings, which can affect subsequent users, and existing solutions do not effectively address security and performance issues related to device firmware and hardware virtualization.
Innovation Solution
Systems and methods provide users with substantially full access to hardware resources while preventing unauthorized modifications by using NIC-based encapsulation and segmentation offload features, adding virtualization information to packet headers, and employing hashing mechanisms to ensure secure and efficient packet processing across virtual and physical address spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If users are given full access to hardware resources in cloud computing environments, then resource utilization and performance are improved, but security risks increase as users can modify firmware or configuration settings affecting subsequent users
Solution Approach 1:
The patent segments packet processing functions between user-space applications and kernel-space network stack, allowing users full hardware access while the kernel maintains security controls. The network interface card segmentation offload feature divides packet handling into user-accessible portions and protected kernel portions, resolving the contradiction between user productivity and system security.
Solution Approach 2:
The patent introduces an intermediary mechanism where the kernel network stack acts as a mediator between user applications and hardware resources. This intermediary maintains security by controlling firmware and configuration settings while allowing users full resource utilization through controlled access interfaces.
2Reliability
If packet processing is performed in the kernel network stack, then security is maintained, but performance overhead increases due to context switching and processing delays
Solution Approach 1:
The patent segments packet processing across user space and kernel space, with the NIC segmentation offload feature handling packet segmentation in user space to avoid kernel context switches. This maintains security through kernel involvement in critical paths while improving performance by moving non-critical processing to user space.
Solution Approach 2:
The patent enables user-space applications to perform packet processing functions independently through the NIC segmentation offload capability, reducing the need for kernel intervention. Applications serve themselves by handling packet segmentation locally, improving performance while the kernel maintains security oversight.
3Reliability
If existing hardware devices are used without exposure to users, then security is maintained, but adaptability decreases as routing and processing functionality cannot be easily moved or customized
Solution Approach 1:
The patent introduces dynamic adaptability where users can customize routing and processing functionality through software configurations while the underlying hardware remains secure. The system dynamically adjusts packet handling behavior based on user needs without exposing hardware firmware to modification, resolving the contradiction between security and adaptability.
Data Source
AI summary
High-speed processing of packets to and from a virtualization environment can be provided while utilizing segmentation offload and other such functionality of hardware such as a network interface card. Virtualization information can be added to extension portions of protocol headers, for example, such that the payload portion is unchanged. The virtualization information can be hashed and added to the payload or stream at, or relative to, various segmentation boundaries, such that the virtualization or additional header information will only be added to a subset of the segmented data frames, thereby reducing the necessary overhead. Further, the hashing of the information can allow for reconstruction of the virtualization information upon desegmentation even in the event of packet loss.