Smartphone Security Insert for Encrypted Cellular Data
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Solution Overview
Problem
Current smartphone security solutions are inadequate for meeting the high-security requirements of organizations, as they can be easily infected by malicious code and lack robust encryption for voice and data communication, despite features like ARM TrustZone or TEE providing a secure execution environment.
Innovation Solution
A security insert with cryptographic functions is integrated into a standard smartphone, disabling the cellular modem, disconnecting from built-in antennas, and using miniature coaxial cables to connect to external antennas, while enabling secure communication through encryption and decryption using standards like AES, ECC, and RSA, and integrating a smaller battery for power, with an external power pack for extended operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security jacket is used to block and bypass internal modem and RF chain, then security is improved, but device complexity and ease of manufacture deteriorate
Solution Approach 1:
The invention extracts the security functions from an external jacket and integrates them into a security insert that fits within the smartphone's battery compartment. This removes the need for external blocking components while maintaining security through cryptographic modules and secure processing environments inside the device.
Solution Approach 2:
The security insert is nested within the battery compartment of the smartphone, utilizing the existing device structure. The insert contains cryptographic modules and secure processing environments that are housed within the smartphone's own housing, eliminating the need for separate external security jackets.
2Reliability
If cryptographic functions are integrated into the smartphone, then security is improved, but device complexity increases
Solution Approach 1:
The security insert serves multiple functions: it provides cryptographic processing, hosts secure applications, manages secure data storage, and interfaces with both the smartphone's modem and external secure networks. This multi-functionality consolidates what would otherwise require multiple separate components into a single integrated unit.
Solution Approach 2:
The security insert contains its own processing unit and cryptographic modules that independently handle security operations without requiring constant intervention from the main smartphone processor. The secure environment self-manages key storage, encryption/decryption operations, and secure communication protocols.
3Loss of information
If all cellular data is routed through the cryptographic module, then data confidentiality is improved, but processing speed deteriorates
Solution Approach 1:
Data encryption and decryption operations are performed in advance by the cryptographic module before data leaves or enters the secure processing environment. This preliminary cryptographic processing ensures that all cellular data is protected end-to-end without requiring real-time processing delays during normal data transmission.
Data Source
AI summary
A method for securing an off-the-shelf smartphone, a secure communication system, and a security insert is provided. The method comprises removing the battery from the off-the-shelf smartphone and inserting the security insert to the battery compartment. The security insert comprises cryptographic module. The method further comprises modifying off-the-shelf smartphone and providing a power and data connection between the security insert and the smartphone. The secure communication system wirelessly transmits outgoing cellular encrypted black data, which is encrypted by the cryptographic module, from the modified off-the-shelf smartphone to a cellular network, and decrypts, by the cryptographic module, incoming cellular black data receives from the cellular network to the modified off-the-shelf smartphone. The security insert enclosure configured to be deployed in a battery compartment.