数字证书不仅仅是一个加密密钥，它还是一个在线凭证。
A digital certificate is more than just a cryptography key; it is an online credential.
这些数据不仅能够非常安全地被加密在数字带中，而且，甚至连强大的计算机都察觉不到这个数据库的存在。
Not only can the data be securely encrypted within a digital tape, but the library's existence on the tape would be invisible even to powerful computers.
本模型不仅适用于实时的、大数据传输的网络系统，而且实现了密钥管理、加密管理、数字签名以及身份认证等功能。
The model not only realizes key management, encrypted communication, digital signature and identity authentication, but also is fit for network system with real time and large data transfer.
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