A national whitelist that listed all permitted sites would also be unworkable.

国家白名单列出了所有允，但也同样不奏效。

Blockchain allows for the generation of a whitelist that will include all trusted customers worldwide. Having such a whitelist will decrease false positives and, consequently, help detect real fraud.

区块链能够生成一份包含全所有可信客户的白名单，这样就能减少误报，当然也有助于识别真正的欺诈行为。