安全散列算法是数字签名等密码学应用中重要的工具。
Secure hash algorithms are important tools for cryptographic applications such as digital signatures.
安全散列算法的运算位数与运算的轮数较多，用硬件实现需耗费大量的资源。
Duo to the many of the bits and times of the SHA, it need a lot of resources with hardware.
hashcash提出质询的方式是，当通过安全散列算法（SecureHash 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。
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（SecureHash 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。
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.
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