Proxy Service for HSM Two-Factor Authentication in Cloud VMs
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Solution Overview
Problem
In cloud computing environments, there is a challenge in implementing two-factor authentication with Hardware Security Modules (HSMs) due to the lack of efficient and simple methods to communicate the second factor, especially for virtual machines that do not have access to physical interfaces like USB ports.
Innovation Solution
A proxy service is provided through a management console that emulates second factors for authentication operations, allowing clients to generate a policy requiring two-factor authentication and using public and private key pairs to verify the second factor, enabling secure access to HSMs even in virtual machine setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two-factor authentication is implemented with HSM in cloud environment, then security is improved, but ease of operation deteriorates due to lack of physical interfaces
Solution Approach 1:
The patent introduces a proxy service as an intermediary component that mediates between the virtual machine client and the HSM. This proxy service receives authentication requests, generates or retrieves second factors (OTP codes), and forwards them to the HSM, thereby enabling two-factor authentication in virtualized environments without requiring physical USB token access.
Solution Approach 2:
The patent replaces the mechanical/physical authentication system (USB tokens requiring physical connection) with a software-based authentication system. The second factor is delivered through software-generated one-time passwords that can be transmitted via network protocols, eliminating the need for physical interfaces in virtualized environments.
2Reliability
If USB tokens are used for two-factor authentication, then security is improved, but adaptability deteriorates in virtual machine environments
Solution Approach 1:
The patent creates a universal authentication mechanism that works across both physical and virtualized environments. The proxy service can handle multiple authentication methods including USB tokens for physical machines and software-based OTP for virtual machines, making the system adaptable to diverse deployment scenarios without compromising security.
Solution Approach 2:
The patent creates a software copy or emulation of the USB token functionality through the proxy service. Instead of requiring the actual physical USB token, the system generates equivalent authentication credentials (one-time passwords) that replicate the security function of the physical token in a virtualized context.
3Ease of operation
If cloud services are used to provision resources, then ease of operation is improved, but security control deteriorates for cryptographic keys
Solution Approach 1:
The patent segments the authentication process into distinct components: the cloud service manages resource provisioning and the proxy service manages cryptographic authentication. This segmentation allows the HSM to maintain strict control over cryptographic keys while the cloud service provides convenient resource management, with the proxy service acting as a secure bridge between them.
Data Source
AI summary
The present disclosure relates to two-factor authentication with a Hardware Security Module (HSM). In response to a login attempt, the HSM indicates that two-factor authentication is required. To generate the second authentication factor, a management console is accessed using credentials. The management console generates the second authentication factor and provides the second authentication factor to the client. The client then provides the second authentication factor to the HSM to complete the two-factor authentication operations.