Digital cash refers to the electroni

单选题 Digital cash refers to the electronic transfer of funds from one party to another. When digital cash is referred to as anonymous or identified, it means that: 数字现金是指资金从一方以电子方式转移到另一方。当数字现金被称为匿名或身份识别时，它意味着：

A、 Anonymous the identity of the bank is withheld; Identified the identity of the bank is not withheld 银行身份被扣留；已确认的银行身份不会被扣留

B、 Anonymous the identity of the cash holder is not known; Identified the identity of the cash holder is known 匿名现金持有者身份不明；现金持有者的身份是已知的

C、 Anonymous the identity of the cash holder is not known; Identified the identity of the merchant is known 匿名现金持有者身份不明；已识别商户的身份是已知的

D、 Anonymous the identity of merchant is withheld; Identified the identity of the merchant is not withheld 匿名商户身份被扣留；已识别商户的身份不会被扣留

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C、 The work factor of double DES is the same as for single DES. 双DES的功因数与单DES相同。

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