Completion Device Signing for Secure Crypto Wallet Access
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Solution Overview
Problem
Conventional cryptographic interaction methods, such as hard and soft wallets, fail to provide secure and convenient access to cryptographic funds across various conditions, especially with the risk of loss or hacking, limiting user access to cryptocurrency.
Innovation Solution
A completion device that establishes a wireless connection with a source device, verifies the request against a pre-configured protocol, signs the interaction using a digital signature, and sends it back to the source device, ensuring secure and authorized transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hard wallet is used for physical storage of private keys, then security is improved through air gapping, but accessibility deteriorates because the device cannot be easily accessed or used in various locations
Solution Approach 1:
The system divides cryptographic functionality into separate components: a source device that initiates transactions and a completion device that stores private keys and completes transactions. This segmentation allows the completion device to maintain security through air-gapping while the source device provides accessibility for initiating transactions anywhere.
Solution Approach 2:
The completion device acts as an intermediary between the user and the cryptocurrency network. It receives transaction requests from source devices, verifies them against pre-configured protocols, and completes transactions using stored private keys, thereby enabling secure access without direct connection to the cryptocurrency network.
2Ease of operation
If a soft wallet is used for software storage of private keys, then accessibility is improved through internet connectivity, but security deteriorates due to increased risk of hacking
Solution Approach 1:
The system separates the functions of transaction initiation and transaction completion into different devices. The source device (soft wallet) handles accessibility and user interaction, while the completion device (hard wallet) handles secure key storage and transaction signing, thereby combining the advantages of both wallet types.
Solution Approach 2:
The completion device serves as a secure intermediary that the source device communicates with over wireless connections. This intermediary maintains air-gapping for security while allowing the source device to provide convenient accessibility for initiating transactions.
3Reliability
If pre-configured protocols with specific source device information are used, then security is improved through verification, but device complexity increases due to configuration requirements
Solution Approach 1:
The system performs preliminary configuration by pre-storing information about authorized source devices and their public keys in the completion device before actual transactions occur. This preliminary action enables automatic verification during transactions without requiring complex real-time configuration or user intervention.
Solution Approach 2:
The completion device automatically verifies incoming transaction requests by comparing source device information against pre-configured protocols and public keys. This self-service verification process eliminates the need for manual security checks or complex configuration during transaction execution.
Data Source
AI summary
A computer-implemented method for completing self-executing cryptographic interaction protocols using a completion device is disclosed. The method comprises: establishing, by the completion device, a wireless connection with a source device; receiving, from the source device, a request for completion of a self-executing cryptographic interaction protocol; comparing the information that identifies the self-executing cryptographic interaction protocol or the source device to a configuration stored in the completion device; and based on the comparing resulting in a match: outputting, via an output component of the completion device, a first indication of the match between the information and the configuration; signing the self-executing cryptographic interaction protocol using a digital signature stored in a cryptographic hardware element of the completion device; and sending the signed self-executing cryptographic interaction protocol to the source device.