Since Satoshi Nakamoto's initial steps in decentralized technology in 2009, this revolutionary process has continued across a broad spectrum. Within this revolution, there are many challenges that could be improved. One of the most fundamental and debated of these challenges is the "Blockchain Trilemma," modeled by Ethereum founder Vitalik Buterin. This model presents us with three main headings: Decentralization, Security, and Scalability.
The 'Blockchain Trilemma' refers to the problem of balancing the three fundamental features of a blockchain. These features form the basic principles of blockchain; however, in practice, it seems almost impossible to perfectly balance these three properties. When evaluating blockchains, assessing how well these three features are balanced is common. Let's now detail these three features:
Decentralization: Decentralization is one of the cornerstones of blockchain technology. It means a system that operates without dependency on any central authority or control point. In traditional financial systems, institutions manage and control everything from customer assets to personal information. Blockchain technology, in contrast, completely reverses this situation. However, this decentralized structure can lead to a decrease in transaction speed. Each transaction cannot be completed until it is confirmed by multiple validators in the network, which slows down the process. At this point, understanding the consensus mechanisms used in blockchain can help you better grasp decentralization.
Scalability: Scalability refers to the capacity of blockchain networks to effectively manage growing volumes of transactions. A blockchain's ability to continue functioning without disruption, whether in high or low usage, can only be addressed through scalability. When it comes to scalability, the TPS (Transactions Per Second) values of projects become prominent. Different blockchain networks exhibit different TPS values.
Security: Blockchains, being open-source, can be susceptible to security vulnerabilities. Therefore, in blockchain, Security means protecting data, ensuring the accuracy of transactions, and being resilient against malicious attacks.
The solution to the blockchain trilemma involves combining these three elements in a balanced manner. Each aspect, when examined independently, reveals its weak points and potential areas for improvement. However, balancing these three fundamental features harmoniously is one of the biggest challenges blockchain networks face.
Source:
https://medium.com/certik/the-blockchain-trilemma-decentralized-scalable-and-secure-e9d8c41a87b3
https://academy.shrimpy.io/post/what-is-the-blockchain-trilemma