Blockchain Networks: how they work and key concepts

Bitcoin (BTC)

History

Created in 2009 by an anonymous entity known as Satoshi Nakamoto, Bitcoin was the first cryptocurrency based on blockchain technology. Its primary purpose was to offer a decentralized digital money system without the need for financial intermediaries.

Technology

It uses a consensus algorithm known as Proof of Work (PoW). Transactions are validated through mining, which consumes a lot of energy but provides a high level of security.

Uses and Limitations

• Mainly used as a store of value and for money transfers.
• Scalability is limited due to its low transactions-per-second capacity.

Ethereum (ETH)

History

Launched in 2015 by Vitalik Buterin, Ethereum introduced the concept of smart contracts, enabling decentralized applications (dApps) to operate on its network.

Technology

Initially used Proof of Work, but transitioned to a Proof of Stake (PoS) system with the upgrade known as The Merge in 2022.

Uses and Limitations

• Foundation for most DeFi applications, NFTs, and DAOs.
• Scalability issues and high transaction costs, though improved with Layer 2 solutions like Arbitrum and Optimism.

Binance Smart Chain (BSC)

History

Launched by Binance in 2020, BSC is compatible with the Ethereum Virtual Machine (EVM), making it easier to develop dApps using similar tools as Ethereum.

Technology

It uses a hybrid consensus model called Proof of Staked Authority (PoSA), which offers higher throughput and lower fees than Ethereum.

Uses and Limitations

• Mainly used for DeFi applications and BEP-20 tokens.
• Criticism for its centralization due to Binance's control over validators.

Solana (SOL)

History

Created in 2020 by Anatoly Yakovenko, Solana focuses on scalability, offering high transaction throughput with low fees.

Technology

It uses an innovative algorithm called Proof of History (PoH), combined with Proof of Stake (PoS), allowing fast and low-cost transactions.

Uses and Limitations

• Popular in DeFi, NFTs, and gaming applications.
• Frequent outages and criticism for node centralization.

Polkadot (DOT)

History

Developed by Gavin Wood (co-founder of Ethereum) and launched in 2020, Polkadot aims to connect multiple blockchains through its parachain architecture.

Technology

It uses a consensus mechanism known as Nominated Proof of Stake (NPoS), facilitating interoperability between different chains.

Uses and Limitations

• Designed for communication and data transfer across various blockchains.
• Challenges in developer and user adoption of parachains.

Cardano (ADA)

History

Founded by Charles Hoskinson (co-founder of Ethereum) in 2017, Cardano focuses on sustainability, scalability, and interoperability.

Technology

It uses a consensus algorithm called Ouroboros, which is based on Proof of Stake (PoS).

Uses and Limitations

• Focused on smart contracts, DeFi, and ecological sustainability.
• Slower adoption due to its academic approach and lengthy development phases.

Conclusion

Main blockchains like Bitcoin, Ethereum, Binance Smart Chain, Solana, Polkadot, and Cardano continue to lead the crypto market. Each offers unique features addressing specific challenges like scalability, interoperability, and sustainability. Their continuous evolution will determine their success in an increasingly competitive digital ecosystem.