Secure Enclave Tamper-Evident Enclosure Unauthorized Access
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Solution Overview
Problem
Existing technologies face challenges in allowing valid access to secure device data without the owner's consent while preventing unauthorized access, particularly for law enforcement, and ensuring the owner is informed of any invalid access attempts.
Innovation Solution
The implementation of a secure enclave within a tamper-evident enclosure with a unique identifier, which requires a challenge/response procedure for access, ensuring that any alteration to the enclosure is detectable by the owner, even if the device is compromised.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption and password protection are used to secure device data, then unauthorized access is prevented, but valid access by law enforcement is blocked when the owner refuses to release the password
Solution Approach 1:
The system divides access control into two independent mechanisms: a password-based software layer for user authentication and a hardware backdoor layer for law enforcement access. The hardware backdoor includes a dedicated access channel and processing circuitry that operates independently from the main software system, allowing lawful access without compromising the password protection mechanism.
Solution Approach 2:
The patent introduces a hardware backdoor as an intermediary access mechanism between the encrypted data and law enforcement authorities. This intermediary includes a physical access channel and processing circuitry that can decrypt data without requiring the user's password, serving as a mediator that bridges the gap between security and lawful access requirements.
2Ease of operation
If a backdoor is provided to allow access without password, then law enforcement access is enabled, but malicious entities can also use it to access data improperly
Solution Approach 1:
The hardware backdoor is implemented with localized security features including a dedicated physical access channel, isolated processing circuitry, and encryption keys stored in a secure hardware location. These local quality differences create a specialized access pathway that is distinct from the main software system, making it difficult for malicious entities to exploit.
Solution Approach 2:
The system employs single-use cryptographic keys and time-limited access credentials for the hardware backdoor. The encryption keys are stored in hardware and can be rotated or invalidated, while access rights are temporary and revocable, preventing permanent unauthorized access by malicious entities.
3Ease of operation
If strong encryption is banned by government, then access to data is simplified for law enforcement, but security against malicious entities is weakened
Solution Approach 1:
The system segments the access control architecture into a software encryption layer that maintains strong security and a hardware access layer that provides simplified law enforcement access. The hardware backdoor includes dedicated processing circuitry and physical access channels that operate independently from the main encryption system, allowing both strong encryption and easy access coexist.
4Ease of operation
If software backdoors are used for access, then access without physical possession is enabled, but the owner cannot detect when their smartphone is compromised
Solution Approach 1:
The system implements a feedback mechanism where the hardware backdoor continuously monitors access attempts and reports to the main processing system. When unauthorized access is detected through the hardware backdoor, the system can alert the user or trigger security responses, providing feedback about the compromise status.
Solution Approach 2:
The hardware backdoor acts as an intermediary monitoring layer that detects access attempts and communicates their status to the main system. This intermediary function allows the owner to be informed about compromise events without requiring direct monitoring of all software access attempts.
Data Source
AI summary
This Application describes devices, and techniques for using them, capable of allowing valid access to targeted device data without the owner's consent, while still informing the owner whenever any invalid access has occurred. In one embodiment, each targeted device's data is protected by several techniques: (A) maintaining protected data on the targeted device encrypted, thus preventing hardware or software access without authorization; (B) maintaining encryption keys for protected data in a “secure enclave”, not software accessible without authorization, and not hardware accessible without substantial effort; (C) maintaining the secure enclave within a tamper-evident enclosure, the tamper-evident enclosure having a unique identifier that is not easily duplicable; and (D) providing relatively easy retrieval of the unique identifier and checking that the unique identifier has not been altered.