Hardware Security Module for High-Speed Network Adapter Encryption
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Solution Overview
Problem
High-speed Ethernet adapters face performance degradation due to the need for high-quality security measures, which can be slowed by the host processor's involvement in cryptographic operations, and existing security solutions are vulnerable to attacks and require complex key management.
Innovation Solution
An I/O device with a hardware security module (HSM) integrated into the network adapter, featuring a crypto engine for encryption and decryption, secure key storage, and a key usage interface that operates independently of the host, using a cryptographic context determined by a policy manager external to the host, and a trust module with a physical hardware key for secure key management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cryptographic operations are performed by the host processor, then security measures can be implemented, but data processing speed is reduced
Solution Approach 1:
The system segments cryptographic operations from general data processing by implementing a dedicated hardware security module (HSM) within the network adapter. The HSM contains specialized crypto engines that handle encryption and decryption independently, while the main data processing pipeline continues operations in parallel. This segmentation allows security functions to be performed without blocking data processing throughput.
Solution Approach 2:
The patent introduces a key usage interface and cryptographic context determination mechanism as intermediaries between the data processing pipeline and the HSM. The pipeline determines cryptographic contexts from packet headers, and the HSM uses these contexts to select appropriate keys from secure storage. This intermediary architecture enables the crypto operations to be performed autonomously by the HSM without requiring host processor intervention, thus maintaining high data processing speed while ensuring security.
2Productivity
If security operations are integrated into the network adapter, then processing speed improves, but device complexity increases
Solution Approach 1:
The patent merges the HSM with the network adapter by integrating the crypto engines, secure key storage, and cryptographic context determination logic directly into the adapter's data processing pipeline. This consolidation allows the adapter to perform high-speed cryptographic operations autonomously without requiring separate host processor involvement, thereby improving crypto operation speed while managing complexity through unified integration.
Solution Approach 2:
The HSM is designed with multi-functional capabilities including key generation, key storage, encryption, decryption, and cryptographic context determination. The secure key storage can hold multiple keys for different cryptographic contexts, and the crypto engines can handle various encryption algorithms. This universality allows a single integrated module to perform multiple security functions, reducing the need for separate dedicated components and thereby managing device complexity.
3Reliability
If keys are stored securely in the HSM, then security is enhanced, but key management complexity increases
Solution Approach 1:
The HSM implements self-service key management by automatically determining cryptographic contexts from packet headers and autonomously selecting the appropriate keys from secure storage. The system performs cryptographic operations without requiring external key management intervention, reducing key management complexity while maintaining high security through automated context-based key selection.
Solution Approach 2:
The patent introduces a cryptographic context determination mechanism as an intermediary between the data processing pipeline and the secure key storage. This intermediary extracts relevant information from packet headers, determines the appropriate cryptographic context, and uses this context to select the correct key from the HSM's secure storage. This abstraction layer simplifies key management by automating the key selection process while maintaining security through protected key storage.
4Productivity
If cryptographic contexts are determined independently of the host, then processing efficiency improves, but authentication requirements increase
Solution Approach 1:
The data processing pipeline performs self-service cryptographic context determination by automatically extracting relevant information from packet headers and using this information to identify the appropriate cryptographic context. This autonomous context determination eliminates the need for host processor involvement in crypto operations, improving processing efficiency while managing authentication through automated pipeline-based verification.
Data Source
AI summary
Methods and systems for implementing security operations in an input/output (I/O) device are disclosed. In an embodiment, an I/O (Input/Output) device involves an I/O port, a host bus configured to be connected to a host, a data processing pipeline within the I/O device coupled to the I/O port and to the host bus to process and forward data between the I/O port and the host bus, and a hardware security module (HSM) within the I/O device coupled to the host bus and to the data processing pipeline, the HSM comprising a crypto engine configured to encrypt and decrypt data of the data processing pipeline, and a secure key storage coupled to the crypto engine containing encryption keys for use in encrypting and decrypting packets, wherein the secure key storage contains keys that are encrypted by the HSM and that are accessible through the HSM.