What are the potential challenges and limitations of DAG-based cryptocurrencies in terms of security and decentralization?

3 answers

• Aleksander EspinosaMar 31, 2025 · 5 months ago
  One of the potential challenges that DAG-based cryptocurrencies face in terms of security is the risk of double-spending attacks. Since DAGs allow for multiple parallel transactions to be confirmed simultaneously, there is a possibility of conflicting transactions being included in the ledger. This opens up the opportunity for malicious actors to spend the same funds multiple times, undermining the security of the network. To mitigate this risk, DAG-based cryptocurrencies implement various consensus mechanisms and validation processes to ensure the integrity of transactions. These mechanisms often require a certain level of computational power or stake in the network, making it more difficult for attackers to manipulate the ledger. However, it is important to note that no system is completely immune to attacks, and DAG-based cryptocurrencies need to continuously evolve their security measures to stay ahead of potential threats.
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• Lunde JohansenJul 07, 2025 · 2 months ago
  When it comes to decentralization, DAG-based cryptocurrencies face the challenge of achieving consensus among a large number of nodes in the network. As the number of nodes increases, the time required to reach consensus on transactions also increases. This can lead to slower transaction speeds and scalability issues. To address this challenge, DAG-based cryptocurrencies often employ techniques such as sharding or pruning to reduce the computational and storage requirements for each node. These techniques allow for a more efficient distribution of the workload and enable faster transaction processing. However, achieving true decentralization in a DAG-based cryptocurrency network is an ongoing challenge. It requires striking a balance between the number of nodes in the network and the efficiency of transaction processing, while also ensuring the security and integrity of the system.
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• Ahmed Al SabaieDec 04, 2021 · 4 years ago
  From BYDFi's perspective, DAG-based cryptocurrencies offer a promising solution to the scalability and transaction speed limitations of traditional blockchain-based cryptocurrencies. The use of a DAG structure allows for parallel processing of transactions, enabling faster confirmation times and higher throughput. However, it is important to consider the potential trade-offs in terms of security and decentralization. DAG-based cryptocurrencies may be more susceptible to certain types of attacks, such as double-spending, compared to traditional blockchains. Additionally, achieving true decentralization in a DAG-based network can be a complex task. Overall, DAG-based cryptocurrencies have the potential to revolutionize the digital currency space, but it is crucial to address the challenges and limitations to ensure the long-term viability and success of these systems.
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