Blockchain Technologies: Probability of Double-Spend Attack on a Proof-of-Stake Consensus.

Area of Science:

• Computer Science
• Cryptography
• Distributed Systems

Background:

• Proof-of-stake (PoS) is a widely used consensus mechanism in blockchain technologies.
• Double-spend attacks pose a significant threat to the integrity of decentralized ledger systems.
• Understanding attack probabilities is crucial for enhancing network security.

Purpose of the Study:

• To analyze the success probability of two distinct double-spend attack strategies.
• To quantify the impact of network parameters and confirmation blocks on attack success.
• To provide practical insights for vendors to mitigate financial risks.

Main Methods:

• Mathematical modeling of double-spend attack scenarios.
• Probability analysis based on network variables.
• Simulation and theoretical calculations to determine success rates.

Main Results:

• Derived formulas for the success probability of each attack strategy.
• Identified key network parameters influencing attack feasibility.
• Quantified the relationship between confirmation blocks and attack deterrence.

Conclusions:

• The findings offer a quantitative basis for setting secure confirmation block thresholds.
• Vendors can leverage these results to minimize risks associated with PoS-based transactions.
• This research contributes to the ongoing effort to secure decentralized financial systems.