Encrypted Source Code Update Mechanism for Control Systems
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Solution Overview
Problem
Conventional control systems face challenges in updating source code without compromising proprietary information, as existing methods require shipping devices for reflashing, incurring high costs and time.
Innovation Solution
A system and method for processing encrypted source code updates, allowing users to download and install updates securely without exposing the underlying source code, using a processor and flash memory to load and execute encrypted object code.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If source code updates are distributed without encryption, then users can easily download and install updates, but the proprietary source code becomes exposed to the public
Solution Approach 1:
The patent creates an encrypted copy of the source code that can be freely distributed. The encrypted update file contains the proprietary source code in an encrypted format, allowing unlimited copying and distribution without exposing the actual source code content. Users receive encrypted copies that cannot be read without the decryption key, thus maintaining security while enabling easy distribution.
Solution Approach 2:
The patent introduces encryption as an intermediary layer between the source code and the user. The encrypted update file acts as a mediator that protects the source code during transmission and storage. The decryption process serves as the intermediary mechanism that allows authorized access only to the control system processor, preventing direct exposure of the source code to users.
2Loss of information
If conventional update methods are used requiring physical device shipment, then source code security is maintained, but shipping fees and manpower costs increase significantly
Solution Approach 1:
The patent replaces the mechanical shipping system with an electronic digital distribution system. Instead of physically shipping devices or media containing source code, the update is transmitted as encrypted digital data over communication networks. This substitution eliminates all physical logistics including shipping fees, handling, and manpower requirements while maintaining security through encryption.
Solution Approach 2:
The patent enables creation and distribution of digital copies of the source code in encrypted form. Multiple encrypted update files can be copied and distributed indefinitely without degrading the quality or security of the source code. This digital copying mechanism replaces the need for physical media distribution and eliminates all associated costs of physical shipping and handling.
3Loss of information
If source code is updated through physical device reflashing, then proprietary information is protected, but update time and logistics complexity increase
Solution Approach 1:
The patent replaces the mechanical process of physical device shipping and manual reflashing with automated electronic distribution and automatic decryption execution. The encrypted update file is transmitted digitally and automatically decrypted and installed by the control system processor without human intervention, eliminating all logistics complexity and reducing update time from days or weeks to minutes.
Solution Approach 2:
The patent enables the control system to perform self-updating by automatically receiving the encrypted update file, decrypting it using its private key, and installing the updated source code without external assistance. This self-service capability eliminates the need for manual intervention in the update process, reducing both time and logistics complexity while maintaining security through automated cryptographic operations.
Data Source
AI summary
This disclosure provides a system and method for updating a control system using an encrypted source code update. The example control system often includes a processor for managing at least a portion of the control system and flash memory communicably coupled with the processor, with the processor operable to load an encrypted update into the flash memory. In one example, a method for updating the control system would include identifying an update for a control system with the update comprising encrypted object code and the control system comprising at least a first processor. At least the first processor is then updated based on or using the identified update.