Digital Asset Self-Custody With Smart Contracts and Vault Storage

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Solution Overview

Problem

Conventional digital asset storage systems rely on custodians, leading to legal delays, risks of asset loss, and pooling of assets, which complicates secure storage and access for users.

Innovation Solution

A system that allows users to securely self-deposit and store digital assets using a processor-based platform with modules for initiation, verification, smart contracts, and vault storage, ensuring user ownership and easy access without a custodian role.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a custodian is used to oversee digital asset storage and retrieval, then legal requirements are met and contracts can be executed, but this results in delays in data storage and creates risks of asset loss or bankruptcy

Engineering Contradiction:
Improveasset securityVSAvoidstorage delay
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The system enables users to self-custody their digital assets through automated smart contracts and multi-signature verification mechanisms. The multi-sig wallet requires multiple authorized parties (including the user) to approve transactions, eliminating the need for a single custodian while maintaining security. This self-service approach removes custodian-related delays and legal requirements while preserving asset protection through cryptographic verification and distributed authorization.

Inventive Principle:
Principle #25Self-service

2Productivity

If digital assets are pooled together from multiple entities like a bank, then storage efficiency is improved, but this generates further risks and delays for the party requiring storage

Engineering Contradiction:
Improvestorage efficiencyVSAvoidasset safety
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The system segments digital assets into individual user-controlled wallets rather than pooling them together. Each user maintains separate ownership through their own multi-signature wallet, eliminating the risks associated with pooled storage such as counterparty risk and centralized failure points. The segmentation is achieved through blockchain-based address management where each user's assets remain distinct and independently secured by their own key pairs and authorization mechanisms.

Inventive Principle:
Principle #1Segmentation

3Adaptability or versatility

If a custodian role is implemented in digital asset storage systems, then legal requirements are satisfied, but this complicates the system and creates potential points of failure

Engineering Contradiction:
Improvelegal complianceVSAvoidsystem complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system replaces the mechanical/legal custodian structure with cryptographic mechanisms. Instead of relying on legal contracts and custodian oversight, the system uses digital signatures, public-key cryptography, and smart contracts to enforce ownership and transaction authorization. This substitution eliminates the need for custodians while maintaining security through mathematical proofs of ownership and automated execution of transfer conditions on the blockchain.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP4614415A1System for secure self deposit and storage of digital assets
Publication Date: 2025.09.10 MARINOV ANGEL
  • EP4614415A1 patent drawingFigure 1
  • EP4614415A1 patent drawingFigure 2
  • EP4614415A1 patent drawingFigure 3

AI summary

Systems for securely self-depositing and storing digital assets. One such system may include a processor disposed in connection with a memory having computer-readable instructions stored thereon and configured to execute a storage system. The storage system itself may comprise an initiation module, a verification module, a bailee module, a contracting module, a vault module, and a withdrawal module. The verification module may comprise a whitelisting submodule. The processor may be configured to execute a storage system via a software application configured to be executed on a memory of a client device, the software application operative to: register a user; verify the identity of the user; receive at least one digital asset; execute at least one smart contract between the user and the custodian; store the at least one digital asset according to the at least one smart contract; and return the at least one digital asset to the user.