Plug Server Encryption via LUKS and Hardware-Locked Keys
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Solution Overview
Problem
There is a lack of effective solutions for securely protecting data on plug servers, especially when they are not connected to the internet, as existing methods rely on internet-connected key servers and do not address physical key security or data theft risks, such as cloning and theft.
Innovation Solution
Implementing a block device level encryption mechanism using Linux Unified Key Setup (LUKS) and physically securing the decryption key by locking it to hardware attributes, ensuring data encryption and decryption only occur with the correct key, even in offline environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is stored on a plug server with only username/password login mechanism, then the plug server is simple to operate and access, but the data is vulnerable to theft and physical swapping attacks
Solution Approach 1:
The authentication mechanism is segmented into two independent parts: username/password for initial access and cryptographic keys for data decryption. This segmentation allows the system to maintain ease of access while adding a layer of security that prevents data theft even if credentials are compromised.
Solution Approach 2:
Cryptographic keys are generated and stored in secure hardware (HSM or TPM) before any data is written to the plug server. This preliminary action ensures that data is encrypted at rest with strong cryptographic protection, making physical swapping or theft ineffective without the corresponding decryption keys.
2Reliability
If internet-connected key servers are used to protect data on virtual machines, then data security is improved, but the solution cannot protect plug servers in offline environments
Solution Approach 1:
A local key management intermediary (HSM or TPM hardware module) is introduced on the plug server itself, replacing the need for remote key servers. This intermediary generates, stores, and manages cryptographic keys locally, enabling secure data protection in offline environments while maintaining the same security level as internet-connected solutions.
Solution Approach 2:
The plug server performs key generation, storage, and management operations autonomously using built-in hardware security modules. This self-service capability eliminates dependence on external key servers and internet connectivity, allowing the system to maintain data security completely offline.
3Adaptability or versatility
If decryption keys are stored in accessible locations for offline decryption, then data can be decrypted without internet connectivity, but the keys become vulnerable to cloning and theft
Solution Approach 1:
Asymmetric cryptography (public-key infrastructure) is used where private keys are never exposed or stored in accessible locations. Only public keys or encrypted data are stored on the plug server. The private keys remain securely isolated in hardware security modules, creating an asymmetric security model that enables offline decryption while preventing key cloning.
Solution Approach 2:
Hardware security modules (HSM) and trusted platform modules (TPM) act as secure containment shells for cryptographic keys. These hardware-based protective layers physically isolate keys from the rest of the system, allowing decryption operations to occur offline while preventing unauthorized access or cloning attempts.
Data Source
AI summary
Various systems, computer program products, and methods for securing a plug server and its data are described. According to the invention, the plug server will be protected via encryption when disconnected from the internet via a block level encryption device. The invention is particularly useful in environments where no internet connectivity exists, and teams must collaborate and collect data in remote regions of the world in a secure responsible manner.