Portable Hardware Wallet with E-Ink Display and NFC Transfer
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Solution Overview
Problem
Current solutions for managing and transferring digital information, such as cryptocurrencies and documents, are limited by dependence on internet connections, energy sources, and lack of secure, univocal access, making them unsuitable for various use cases and vulnerable to unauthorized access and double spending.
Innovation Solution
A portable device with a microchip-based encryption unit, e-ink technology, and NFC circuit that allows secure storage, display, and transfer of digital information without internet reliance, featuring a private key modification mechanism using Zero Knowledge Proofs and locking states to control access and ownership, enabling secure, energy-efficient operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital wallets are used for storing and accessing digital currency, then accessibility and ease of use are improved, but security and protection against unauthorized access deteriorate due to internet connection requirements and vulnerability to hacking
Solution Approach 1:
The patent extracts the private key from digital wallet software and stores it physically on a hardware device (USB stick or NFC card). This separation removes the vulnerability of internet-connected software wallets while maintaining accessibility through physical possession of the device.
Solution Approach 2:
The patent introduces a physical hardware device as an intermediary between the user and the digital currency. This intermediary layer (the portable device with stored private key) provides enhanced security while maintaining ease of access through simple physical possession and optional biometric authentication.
2Reliability
If physical wallets are used for secure storage of digital currency, then security is improved, but accessibility and ease of transfer deteriorate due to lack of independent display and connection requirements
Solution Approach 1:
The patent makes the physical wallet device multi-functional by integrating both secure storage capabilities and display functionality. The device can store private keys securely while also displaying wallet contents, transaction details, and supporting multiple authentication methods (PIN, biometrics), thereby improving accessibility without compromising security.
3Ease of operation
If burner wallets are used for disposable transactions, then ease of transfer is improved, but security and prevention of double spending deteriorate due to paper format limitations
Solution Approach 1:
The patent uses NFC technology to enable wireless copying of the private key from the portable device to another device. This digital copying method replaces paper-based burner wallets, maintaining ease of transfer while preventing double spending through cryptographic verification and blockchain validation.
4Reliability
If portable devices are made more secure with encryption and access control, then security is improved, but device complexity and difficulty of operation increase
Solution Approach 1:
The patent segments the authentication process into multiple independent layers (PIN code, biometric data, device passcode) that can be used individually or in combination. This segmentation allows flexible security configurations where users can choose appropriate authentication methods based on their needs, reducing perceived complexity while maintaining strong security.
Data Source
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AI summary
The portable device (1) for the exchange, transfer and transport of sensitive digital information, comprises a storage unit (2) of digital information (I), an encryption unit (3) operatively connected to the storage unit (2) and containing a private key (K) for encrypting this digital information (I), modification means (4) configured to modify the private key (K), wherein said portable device (1) is configured to perform verification operations and demos of all the operations carried out by means of a reference blockchain.