Secure Processor Software Download via Device-Specific Encryption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in securely downloading software to multiple devices while preventing unauthorized code loading and exploiting known bugs, especially given the complexity of managing different content and services across numerous devices.
Innovation Solution
A system where a server generates encryption keys based on personalized unit data for secure processors, allowing for secure software downloads by encrypting and decrypting code images using unique keys, ensuring only intended devices can execute the software, and limiting the number of downloads to prevent malicious use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If software code images are downloaded to multiple devices, then software updates and new services can be provided, but the risk of unauthorized code loading and exploitation of bugs increases
Solution Approach 1:
The patent segments the software distribution process by creating device-specific encrypted code images. Each device receives a uniquely encrypted version of the software, segmented by device identifier. This prevents unauthorized loading because code encrypted for one device cannot be decrypted or executed on another device, thus maintaining security while enabling widespread software updates.
Solution Approach 2:
The patent introduces an intermediary encryption mechanism using device-specific keys as mediators between the central software source and individual devices. The encryption key acts as an intermediary that ensures only the intended device can access and execute the software, preventing malicious users from loading unauthorized code on other devices.
2Reliability
If encryption keys are generated for each device, then unauthorized code loading is prevented, but the complexity of key management increases
Solution Approach 1:
The patent implements self-service by having each device generate its own encryption key based on its unique device identifier. The device uses its own identifier to encrypt the software code image, and the same identifier is used to decrypt and execute the code. This eliminates the need for complex centralized key management, as each device autonomously manages its own security credentials.
Solution Approach 2:
The device identifier serves multiple functions simultaneously: it uniquely identifies the device, generates the encryption key, and enables both encryption and decryption operations. This multi-functionality reduces key management complexity by consolidating multiple security functions into a single identifier-based mechanism.
3Adaptability or versatility
If previous application code images can be loaded, then compatibility is maintained, but known bugs can be exploited
Solution Approach 1:
The patent applies preliminary action by encrypting software code images with device-specific keys before distribution. This pre-encryption ensures that even if previous code images are available, they cannot be loaded on devices for which they were not specifically encrypted. The encryption is established in advance, preventing retrospective exploitation of bugs in older versions.
Data Source
AI summary
An encryption key may be generated based on personalized unit data associated with a software download recipient, for example, a secure processor. In some aspects, the secure processor may generate a decryption key based on its personalized unit data, and a software download may be performed between the software provider and the secure processor using the generated encryption keys. The secure processor may then decrypt and load the software for execution. The encryption and decryption key generation may also be based on a sequence number or other data indicating one or more previous software downloads at the secure processor. Using the sequence number or other data, sequences of multiple encryption and/or decryption keys may be generated to support multiple software downloads to a secure processor.