Exploring Qitmeer’s Technological Evolution: A Unique Path to Overcoming the Blockchain Trilemma

Qitmeer Network
3 min readMay 31, 2024


Since its inception, blockchain technology has grappled with inherent challenges, notably the “Blockchain Trilemma” , introduced by Ethereum co-founder Vitalik Buterin. This concept highlights the difficulty of achieving decentralization, security, and scalability simultaneously in a blockchain system.

This article examines the Blockchain Trilemma and explores how Qitmeer addresses this challenge.

The Blockchain Trilemma

The trilemma of blockchain refers to the difficulty of achieving decentralization, security, and scalability simultaneously in a blockchain system under current technological conditions.

Bitcoin, the earliest blockchain platform, excels in decentralization and security but struggles with scalability. Its transaction speed is significantly lower than traditional payment systems like Visa and Mastercard, making it less competitive for daily transactions. Solutions like Layer2 and the Lightning Network have been proposed but face new challenges.

Developers generally believe that achieving all three goals simultaneously in a single blockchain network is impossible, necessitating trade-offs. Public blockchains must define their network positioning and decide which sacrifices to make for optimal performance.

The Value and Challenges of Decentralization

Decentralization is a key attraction of blockchain, ensuring no single person or entity can control assets.

For example, in the Bitcoin network, there is no centralized authority, allowing users to freely own and transfer bitcoins. In contrast, traditional payment networks like Visa control the entire network, making user transactions dependent on Visa.

However, excessive decentralization can lead to inefficiencies. For instance, while Bitcoin is highly decentralized and secure, its network is inefficient. A balance must be found between decentralization, scalability, and security.

The Pursuit and Challenges of Scalability

Scalability issues hinder the large-scale application of many DAPPs. Ideally, blockchain should handle millions of transactions per second (TPS) and provide a payment experience superior to Visa and Mastercard.

Current technology has yet to achieve this goal. Enhancing blockchain scalability requires technical optimization and adaptation to specific use cases while balancing security, decentralization, and user experience.

The Persistence and Trade-Offs of Security

Security is crucial in blockchain, especially when addressing the Trilemma. Security requires significant computational power, potentially conflicting with decentralization and scalability.

Developers must decide whether to sacrifice some security to enhance transaction speed or network scale. Consensus mechanisms are vital to ensure each transaction is correct and synchronized across all nodes, requiring robust computational power and algorithms.

As blockchain applications increase, security becomes even more critical. Ensuring blockchain security is key to protecting users and the network from potential threats. Therefore, a balance must be struck to ensure long-term reliability and security.

How Qitmeer Addresses the Blockchain Trilemma

Qitmeer stays at the forefront of blockchain scaling technologies, adopting an innovative BlockDAG ledger consensus protocol.

This approach retains Bitcoin’s advantages while balancing the Trilemma, enhancing network performance without sacrificing security and decentralization.

Qitmeer defines its BlockDAG network as a high-speed value transfer layer, using the MeerDAG consensus and UTXO model combined with PoW mining.

This combination significantly boosts TPS, reaching peaks of 4000+. The MeerDAG consensus introduces the concept of blocks, enabling parallel transactions and reducing the orphan block rate, increasing transaction throughput.

However, the BlockDAG network still faces scalability limitations and cannot fully integrate with other blockchain ecosystems.

To address this, Qitmeer introduces a modular cross-chain container layer above the BlockDAG network, enabling communication between different network layers via the Meerlink protocol, achieving compatibility with major ecosystems like Ethereum.


Qitmeer’s team innovates with solutions like layered network architecture and graph-based ledger protocols, achieving a balance between decentralization, security, and scalability. This approach lays a solid foundation for future decentralized applications and the digital economy.

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Qitmeer Network

Qitmeer Network is the next generation payment network infrastructure based on BlockDAG technology.