Consensus Layer Alternating Proof of Space and VDF
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Solution Overview
Problem
Decentralized computing platforms reliant on proof of work face issues of centralization due to high compute resource costs, leading to energy and material waste, and security vulnerabilities from arms races and attack surfaces opened by shifting to proof of stake systems.
Innovation Solution
Implementing a consensus layer that alternates proof of space with verifiable delay functions to reduce compute resource waste and maintain high security values, using a blockchain architecture with a trunk chain for proof of space and a foliage chain for transactions, which mitigates digging and long-range attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If proof of work is used for consensus, then security is maintained, but compute resource waste and energy consumption increase
Solution Approach 1:
The patent changes the consensus mechanism from proof of work to proof of space, fundamentally altering the resource parameter from compute power to storage capacity. This allows the system to maintain security while eliminating the excessive compute resource waste inherent in proof of work systems, as space-based consensus does not require continuous computational solving of cryptographic puzzles
Solution Approach 2:
The patent replaces the computational mechanics of proof of work with the spatial mechanics of proof of space. Instead of using computational effort (mechanical system) to secure the network, it uses storage space allocation, substituting one resource constraint with another that is less energy-intensive and more sustainable
2Loss of energy
If proof of space is used for consensus, then compute resource waste is reduced, but security vulnerabilities increase due to open attack surfaces
Solution Approach 1:
The patent implements periodic alternation between proof of space and verifiable delay function (VDF) mechanisms in a hybrid consensus system. This periodic switching prevents adversaries from exploiting单一 attack surfaces, as the changing consensus requirements make it difficult to prepare targeted attacks in advance
Solution Approach 2:
The patent creates a composite consensus mechanism by combining proof of space and VDF into a hybrid system. This composite approach leverages the resource efficiency of proof of space while adding the security properties of VDF, creating a consensus system that is both efficient and secure
3Loss of energy
If proof of stake is used for consensus, then energy consumption is reduced, but security vulnerabilities increase from arms races and attack surfaces
Solution Approach 1:
The patent employs periodic alternation between different consensus mechanisms (proof of space and VDF) to prevent the system from becoming vulnerable to targeted attacks. This periodic change in consensus requirements disrupts any attempt by adversaries to exploit static vulnerabilities, maintaining security while keeping energy consumption low
Data Source
AI summary
Disclosed are aspects of an untrusted decentralized computing platform that includes an untrusted decentralized database which participant computing systems within the platform reach consensus on an accepted representation thereof. Some aspects of the databased include one or more directed acyclic graphs, which may include cryptographic hash pointers. Some aspects include an untrusted decentralized database architecture that includes two constituent chains. Some aspects of a consensus layer of the untrusted decentralized computing platform alternate a proof of space with a verifiable delay function to reduce compute resource waste relative to systems reliant on compute sources for proofs of work. In some aspects of a consensus layer alternating the proof-of-space and the proof-of-time, a single difficulty factors may be determined by multiplying their difficulty factors together to generate a single variable which accounts for difficulty for both proofs.