Arwen as they were saying was like a service provider- solving security and fast cross-chain swaps. what makes it secure is, example, you want to move your coins from your wallet. instead of using the exchanges' wallet a blockchain-based escrow will be used. imagine you're trading on exchange that has malicious behavior, your coins are not at risk of theft. search for they key word 'escrow' maybe you'll learn some. But for now they bring more security to Kucoin exchange and build a parternership with them. https://www.kucoin.com/news/en-kucoin-partners-with-arwen-to-bring-a-non-custodial-trading-solution-to-experien-kucoin-users