The way hashcash poses a challenge is by asking "minters" to produce strings (stamps) that when hashed with the Secure Hash Algorithm, SHA-1, have a number of leading zeros in their hash.

hashcash 提出质询的方式是，当通过安全散列算法（Secure Hash Algorithm）进行散列时，要求“minters”生成 一个字符串（戳记，stamps），在它们的散列中有很多前导零。

youdao