Security Data Processing Device Script Verification
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Solution Overview
Problem
Hardware Security Modules (HSMs) face challenges in updating software to accommodate new programmable devices without disrupting manufacturing lines, ensuring secure cryptographic operations in untrusted factory environments, and preventing cloning of devices.
Innovation Solution
A security data processing device with a processor and memory, configured to receive and verify scripts for provisioning programmable devices, manage cryptographic operations, and maintain integrity through authorization keys and metadata, ensuring secure programming and preventing unauthorized use of credentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HSM software is updated to accommodate new programmable devices, then adaptability to new devices is improved, but manufacturing line interruption and retesting costs increase
Solution Approach 1:
The HSM software is segmented into a stable core component and an updateable script component. The script can be updated independently to accommodate new device types without requiring a full software update or manufacturing line interruption. This allows the provisioning instructions for new programmable devices to be added as separate, isolated script segments that can be loaded and executed without affecting the stability of the existing HSM system.
2Adaptability or versatility
If HSM software is updated in situ, then ability to provision new devices is improved, but risk of stopping other product lines increases
Solution Approach 1:
Before updating the HSM software with new provisioning scripts, the updated script is verified and validated in advance. This preliminary verification ensures that the new script for accommodating new device types will not interfere with existing product lines. The script is tested and confirmed to be safe before being loaded into the HSM, thus preventing potential disruptions to other product lines while enabling provisioning capability for new devices.
3Ease of manufacture
If factory has access to OEM secrets for cryptographic operations, then ease of manufacturing is improved, but security against cloning and unauthorized use deteriorates
Solution Approach 1:
The HSM acts as a secure intermediary between the OEM secrets and the manufacturing process. The OEM secrets (private keys, certificates) are loaded into the HSM which provides a secure environment for cryptographic operations. The factory can perform cryptographic operations needed for manufacturing, but the HSM controls and limits access to the secrets, preventing the factory from extracting or misusing them for cloning or unauthorized purposes.
Solution Approach 2:
The HSM provides self-service security by automatically managing the cryptographic operations and secret key protection without requiring the factory to have direct access to the secrets. The HSM itself performs the cryptographic functions needed for provisioning, generating keys, signing certificates, and validating device credentials autonomously, thus eliminating the need for the factory to handle sensitive OEM secrets while still enabling manufacturing operations.
Data Source
AI summary
A security data processing device comprising a processor and memory, the processor configured to: receive a script comprising at least one instruction set for provisioning a type of programmable device, the instruction set(s) defining one or more cryptographic operations, each of the cryptographic operations referring to a parameter; store the script in memory; verify a signature associated with the script using an authorization key retrieved from memory; receive a programming request from a programming module of a programming machine in communication with said processor, said programming request requesting the programming of a programmable device and identifying an instruction set of the instruction set(s) in said script; for each cryptographic operation in the identified instruction set, determine a value for the parameter and perform the cryptographic operation using the value; and in response to performing each cryptographic operation, output programming information to the programming module for programming the programmable device.