Remote Mobile Data Modification via Hash Verification
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Solution Overview
Problem
Mobile devices pose a risk of data security breaches when lost or stolen, as existing technologies lack effective methods for securely and remotely modifying data to prevent unauthorized access and use.
Innovation Solution
A wireless communication system utilizing a hash function, such as SHA-224, to securely modify data in mobile device memory by comparing incoming messages to a secret message, allowing for remote data encryption, erasure, or replacement, thereby protecting sensitive information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is stored in mobile device memory, then data accessibility and usability are improved, but data security and protection from unauthorized access deteriorate
Solution Approach 1:
The system performs preliminary actions by establishing a secure hash verification mechanism before data access. A secret hash value is pre-computed and stored in the device, enabling future remote verification of data integrity and authorization status without requiring continuous connection to external systems.
Solution Approach 2:
The patent introduces an intermediary verification mechanism using hash functions. Instead of directly accessing or protecting data, the system uses a cryptographic hash as an intermediary layer that verifies data integrity and authorization status, thereby enabling secure remote modification without direct data exposure.
2Reliability
If remote data modification capability is implemented, then data protection ability is improved, but system complexity increases
Solution Approach 1:
The patent extracts the complex cryptographic verification logic from the main data processing flow. By separating the hash verification mechanism into a distinct preliminary step, the system achieves reliable data protection while maintaining relative simplicity in the core data access operations.
Solution Approach 2:
The device performs self-verification of data integrity and authorization status using the pre-stored secret hash value. This self-service capability enables automatic detection of unauthorized modification attempts without requiring external verification systems, thereby improving reliability while minimizing added complexity.
3Reliability
If secret message verification is performed, then security against unauthorized modification is improved, but processing time increases
Solution Approach 1:
The secret hash verification is performed as a preliminary action before any data access or modification operations. By completing the security verification upfront, the system ensures protection against unauthorized modification while allowing subsequent data operations to proceed efficiently without repeated verification overhead.
Data Source
AI summary
Methods and corresponding systems in a mobile device for remotely modifying data stored in the mobile device include receiving a message in the mobile device. The message can be a short message service (SMS) message. The message is compared to a secret message, wherein the secret message is a hash value output by a hash function, wherein inputs to the hash function include a text string and a secret text string. The text string can be an e-mail address, and the secret text string can be a password of the mobile device. In response to the message matching the secret message, data stored in memory in the mobile device is modified to prevent unauthorized access. A secret message cancellation can be received in the mobile device to cancel a scheduled memory modification. Memory modification can include erasing data, replacing data, or encrypting data.