Lost in thought, Xiao Yi suddenly slapped his forehead.
"Where did my mind wander off to... Better think about this problem first."
"Cross-blockchain encrypted transactions... classification sieve... protocol..."
Millionaires' Problem.
He wrote those words on the draft paper again.
In the process of solving the Millionaires' Problem, one likewise had to first construct a protocol before the solution could be achieved.
No third party participated in that process, ensuring the security of the transaction.
"But... what if one of the two millionaires is dishonest, or both want to know the other's wealth?"
"Then it becomes a semi-honest model..."
"But it also involves prime numbers..."
"And most crucially, this transaction does not occur within a blockchain, but between different chains."
Xiao Yi rubbed his brow with a headache.
If it were merely a transaction within a blockchain, it would not have been so troublesome. The issue was that this was a transaction across blockchains. Bitcoin was Bitcoin, Ethereum was ETH, so cross-chain transactions needed to make it possible to exchange Bitcoin for ETH.
Therefore, besides ensuring the atomicity of cross-chain transactions and so on as previously mentioned, security also had to be guaranteed.
And it was precisely because they had to "cross chains" that the problem arose. A third party appeared during the transaction process, usually a cross-chain trading platform. In the familiar world of CSGO skin trading, NetEase BUFF was equivalent to such a cross-chain trading platform.
This created the possibility of the trading platform stealing from those it was entrusted to oversee, as well as hacker attacks and the like. In fact, both kinds of incidents had already occurred during cross-chain transactions.
That was also the main reason so many organizations, including the World Bank, wanted to develop this protocol.
And now, because of the risks brought by the