Integrated TPM and Non-Volatile Memory Module for Secure Board Replacement
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Solution Overview
Problem
In multifunction devices, the separate management of non-volatile memory and TPM (Trusted Platform Module) leads to incorrect combinations during controller board replacements, causing operational failures due to incorrect installation of the TPM.
Innovation Solution
The non-volatile storage medium and security chip are integrated and attachable/removable as a single body to the main board, ensuring correct pairing and preventing wrong combinations during board replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the TPM and non-volatile memory are managed separately on the controller board, then the device structure is more flexible and components can be independently replaced, but the risk of incorrect TPM installation increases leading to operational failures
Solution Approach 1:
The patent merges the TPM and non-volatile memory into a single integrated module that is attached to the controller board as one unit. This combination ensures that when the module is installed, the TPM and storage medium are always in the correct configuration, eliminating the risk of mismatched components while maintaining replaceability of the entire module.
2Reliability
If the TPM is directly attached to the controller board for secure decryption, then security is improved, but the complexity of ensuring correct TPM-memory pairing increases during replacements
Solution Approach 1:
By combining the TPM and non-volatile memory into a single integrated module, the patent eliminates the complexity of ensuring correct pairing between components. The integrated module maintains secure decryption functionality while simplifying the replacement process, as the entire module can be installed as one unit without requiring separate configuration or pairing steps.
Data Source
AI summary
A multifunction device includes: a non-volatile memory storing encrypted information, which is information that is encrypted; a TPM for decrypting the encrypted information; and a main board communicating with the non-volatile memory and the TPM. The non-volatile memory and the TPM are attachable to and removable from the main board, as a single body. More specifically, the multifunction device includes: a first sub board which has the non-volatile memory attached thereto and is attachable to and removable from the main board; and a chip board which has the TPM attached thereto and is attachable and removable from the first sub board.