Private Key Segmentation for Blockchain Security
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Solution Overview
Problem
Blockchain-based assets are vulnerable to theft and accidental loss due to the need for secure private key management, which poses challenges for trust and security in decentralized transactions and cybersecurity applications.
Innovation Solution
A method is introduced to partition a private key into multiple parts, with one part stored on a server and another delivered to the user, allowing for secure reconstruction of the key for transaction purposes, including encryption and decryption using a mnemonic, and validation through smart contracts to ensure secure blockchain transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the private key is stored locally by the user, then the user has full control over their assets, but the risk of accidental loss or theft increases
Solution Approach 1:
The private key is divided into multiple parts (first part delivered to user, second part stored on server). This segmentation allows the system to distribute control and risk - the user retains operational control by holding one part, while the server securely stores another part, eliminating the need for the user to hold the complete private key and thus reducing accidental loss risk.
2Reliability
If the private key is stored remotely with a third party, then the risk of accidental loss is reduced, but the risk of hacking or digital theft increases
Solution Approach 1:
By splitting the private key into parts stored in different locations (user device and server), the system prevents a single point of failure. Even if the server is compromised, attackers cannot reconstruct the full private key without the user's part, thus mitigating hacking risk while maintaining remote storage benefits.
Solution Approach 2:
The patent introduces an intermediary mechanism (smart contracts and validation systems) that mediates between the user and the blockchain network. This intermediary layer validates transactions without requiring full private key exposure, reducing the attack surface for hackers while maintaining secure access control.
3Reliability
If the private key is written down or saved on hardware, then the key can be recovered, but it can still lead to permanent loss or exposure to theft
Solution Approach 1:
Instead of storing the complete private key in a single recoverable form (paper or hardware), the system segments it into multiple parts distributed across different secure locations. This maintains recoverability through the reconstruction process while eliminating the single-point vulnerability of traditional storage methods.
Solution Approach 2:
The system creates functional copies of key parts stored in different locations rather than relying on a single physical copy. The first part is delivered to the user and the second part is stored on the server, creating a distributed copy system that provides both recoverability and security against theft or loss of any single copy.
4Adaptability or versatility
If blockchain technology is used for decentralized transactions, then trustless transactions are enabled, but vulnerability to theft remains a major drawback
Solution Approach 1:
The private key segmentation approach enables blockchain's decentralized transaction capabilities while mitigating theft vulnerability. By requiring multiple parts for key reconstruction, the system maintains the trustless, decentralized nature of blockchain transactions while adding a layer of security that prevents single-point compromises from leading to asset theft.
Data Source
AI summary
A method of performing a blockchain transaction includes partitioning a private key of an account into a first part, a second part, and a third part, using a processor. The method further includes delivering the first part to a user of the account via a network. The method further includes storing the second part on a first server in association with information about the end-user. The method further includes receiving the first part from the user via the network. The method further includes reconstructing the private key of the account using the first part and the second part. The method further includes performing the blockchain transaction using the account and the reconstructed private key.