In a Reddit post on Friday, Ethereum (ETH) co-founder Vitalik Buterin highlighted important security concerns around bridging in the blockchain ecosystem. As Buterin mentioned, keeping the original assets of the living chain (Ethereum on Ethereum, Solana on Solana, etc.) provides a certain degree of immunity against 51% attacks. Even though hackers can censor or reverse transactions, they cannot prevent them from decrypting.

The rule also applies to the Ethereum app. For example, if a hacker launches a 51% attack (controlling 51% of the total ETH in circulation), and the investor exchanges 100 ETH for 320,000 DAI stablecoins, the final state remains constant, i.e. the investor will always receive either 100 ETH or 320 000 DAI.

However, Buterin went on to say that the same level of security does not apply to transverse bridges. In the example he traveled, if an attacker deposits his ETH on the Solana Bridge (SOL) to receive Ether encapsulated in Solana (WETH) and then returns that transaction to the Ethereum page after the Solana page confirms it, he will suffer devastating losses to other users if the tokens are locked tokens in the SOL-WETH contract, where the encapsulated tokens are no longer supported by the source at a 1: 1 ratio.

Buterin also demonstrated how the use of security can expand passively as more bridges are added to the cross-chain. In a theoretical network of 100 threads, a high level of interdependency and nested derivatives means that a 51% attack on one chain, especially a small chain, could potentially infect the entire system. According to Crypto 51, launching a 51% attack on the Ethereum network costs hackers up to $ 1.78 million per hour. However, the cost drops to $ 13,846 per hour for blockchain networks like Bitcoin Cash.

Source: CoinTelegraph

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