In recent months, there has been frequent activity in the cross-chain security field, with several major protocols quietly upgrading their defense systems.

LayerZero V2 has designed a decentralized verification network—out of 30 independent validators, 20 must reach consensus to confirm a cross-chain transaction. This multi-signature mechanism is quite robust from a mathematical perspective. Wormhole has taken a different approach, implementing a ZK light client scheme to achieve trustless cross-chain message verification—simply put, it uses cryptography to guarantee security instead of relying on intermediaries. Axelar's universal messaging protocol is even more impressive, supporting over 50 major blockchains.

Are these technologies effective? Security audit firm Quantstamp has released a report with quite convincing data—cross-chain protocols employing multi-layer verification mechanisms can raise the attack cost to over $1 billion. Once this threshold is reached, actual attacks on cross-chain bridges have surprisingly decreased by 70% in the most recent quarter. This indicates that these new solutions are not just lip service; they are genuinely providing protection.

Looking back at a series of cross-chain bridge hacks last year, this shift is actually very significant.