Decentralized Cryptographic Key Management via Blockchain Validator Storage
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Solution Overview
Problem
The secure storage and transfer of cryptographic private keys are hindered by the risk of permanent loss, especially in cases of death or incapacitation, and the need for joint ownership without unequal control among group members.
Innovation Solution
A method involving a key management system that splits asset private keys into subkeys, with a threshold number required for restoration, where a validator subkey is encrypted and stored on a blockchain platform, allowing controlled access and transfer of key management without premature access by group members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single private key is used to protect assets, then access control is simple, but the risk of permanent loss increases
Solution Approach 1:
The patent divides the single private key into multiple share keys distributed among different users. Each user holds a portion of the key material, and no single user can access the asset alone. The share keys are stored in cold storage devices and can be recovered through a distributed reconstruction process, eliminating permanent loss while maintaining operational simplicity through automated key management.
2Reliability
If backup access is provided to heirs, then asset protection against loss is improved, but control over the asset is weakened
Solution Approach 1:
The patent implements preliminary action by pre-configuring the key sharing structure and distribution mechanism before the owner needs access. The share keys are divided and distributed to trusted users in advance, with the system automatically managing the reconstruction process when needed. This eliminates the need for manual intervention or premature access while ensuring asset protection is already in place.
3Reliability
If joint ownership is implemented among group members, then asset security is improved, but the complexity of key management increases
Solution Approach 1:
The patent implements self-service by enabling the system to automatically manage key reconstruction without human intervention. When a user needs access, the system automatically contacts other users, collects their share keys, and reconstructs the private key through cryptographic operations. This automated process eliminates manual key management complexity while maintaining secure joint ownership among group members.
Data Source
AI summary
Cryptographic key management systems configured to provide key management services for the secure and decentralized control and storage of private cryptographic keys and other information. Asset private keys, seeds, passphrases, and other digitized information may be split into a plurality of subkeys and distributed to a group of people to allow the group to gain control of the asset private key if and when a specified condition has occurred. In some examples, the group of people receive less than a threshold number of the subkeys required to restore the asset private key and one or more of the subkeys required to restore the asset private key are defined as validator subkeys, the validator subkeys separately and securely stored. In some examples, the validator subkeys are encrypted and the encrypted validator subkeys stored on a blockchain platform.