最后，通过建立远程数码打样的RSA数字签名方案，保证了网络传输数据的安全性以及数字签名的有效性。
Finally, by setting up RSA digital signature of remote digital proof, the security of network transmission and validity of digital signature is assured.
如果丢失的私钥只是用于数字签名文档，那么就可以生成一个新的密钥，而不会影响对已经签名的文档的有效性。
If the private key that's lost is only used for digitally signing the documents, a new key may be generated without affecting the validity of the existing signed documents.
也应该理解证书颁发机构不能在所有情况下都验证数字签名所基于的数字证书的有效性。
You should also understand that certification authorities cannot in all circumstances check the validity of a digital certificate on which a digital signature is based.
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