UEFI BIOS Key Management for Self-Encrypting Drives
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Solution Overview
Problem
Existing systems for managing self-encrypting data storage devices lack an efficient method for secure key management and access, particularly in scenarios where data storage devices need to be unlocked and registered across servers, leading to potential security vulnerabilities and complexities in handling unregistered drives.
Innovation Solution
A removable data storage device with a unified extensible firmware interface (UEFI) BIOS and a key management module that loads onto a server to access and manage secure storage areas, utilizing a local key management server (LKMS) to unlock and register self-encrypting drives (SEDs) by retrieving and using access keys, ensuring secure access and registration of SEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a removable data storage device with UEFI BIOS and key management module is used to manage secure keys, then security and efficiency of key management is improved, but device complexity increases
Solution Approach 1:
The system segments key management functions into distinct components: a removable data storage device containing UEFI BIOS and key management module, a local key management server (LKMS) for centralized key storage, and individual self-encrypting drives (SEDs) for data storage. This segmentation allows each component to specialize in specific security tasks, improving overall security while making the complex system more manageable through modular architecture.
Solution Approach 2:
The removable data storage device with UEFI BIOS acts as an intermediary between the server and the encrypted drives. It loads the key management module into server memory and facilitates secure communication between the LKMS and SEDs, thereby improving security by introducing a dedicated security layer without requiring direct integration of all components.
2Device complexity
If existing systems manage self-encrypting drives without a dedicated key management device, then device complexity is reduced, but security vulnerabilities and access efficiency deteriorate
Solution Approach 1:
The removable data storage device serves multiple functions: it stores the UEFI BIOS, contains the key management module, holds secure key storage areas, and interfaces with both the server and encrypted drives. This multi-functionality consolidates what would otherwise require separate devices, maintaining lower overall system complexity while providing dedicated security management capabilities.
3Reliability
If multiple secure storage areas with hierarchical key access are implemented, then access control and security are improved, but key management complexity increases
Solution Approach 1:
The system implements local quality by creating distinct secure storage areas with different access requirements within the removable data storage device. The first secure storage area stores keys accessible through basic authentication, while the second secure storage area stores more sensitive keys requiring additional authentication. This allows appropriate security levels to be applied locally to different key types without uniformly complicating the entire system.
Data Source
AI summary
A local key management system can be implemented with a unified extensible firmware interface (“UEFI”) basic input/output system (“BIOS”). The local key management system may be part of a removable data storage device that has a first secure area protected by a cryptographic module (e.g. hardware integrated circuit). The removable data storage device may also have a second secure area that stores a key to unlock a security enabled data storage device. The UEFI BIOS may be implemented to manage unlocking of security enabled data storage devices or data bands. The UEFI BIOS may also load a UEFI registration shell to manage registration of one or more security enabled drives or bands.