也许程序会检查密码以认证用户，或者对数据加密以将它隐藏等等。
Perhaps the program checks passwords to authenticate users, or encrypts data to keep it hidden, and so on.
除了认证问题外，能够对数据库服务器的安全形成威胁的还包括对敏感信息未经授权的访问。
In addition to authentication issues, threats to the security of a database server involve unauthorized access to sensitive information.
安全：系统对数据和服务的访问提供认证。
Secure: The system authenticates access to data and services [1]
MD 5报文摘要算法是一种应用广泛的身份认证算法，该文首先对数据加密技术进行了简要的概述。
MD5 algorithm is an authentication method used in a broad research field. The data encryption techniques are summarized in this paper.
对系统安全策略的研究是一项庞大的工程，但其中最基本也是最关键的研究课题主要包括两大部分，一是对数据加密技术的研究，另一个是对身份认证技术的研究。
Although it's a huge project, the most fundamental and critical theme includes two parts, one is the research on data encryption, the other is on certification authentication.
对系统安全策略的研究是一项庞大的工程，但其中最基本也是最关键的研究课题主要包括两大部分，一是对数据加密技术的研究，另一个是对身份认证技术的研究。
Although it's a huge project, the most fundamental and critical theme includes two parts, one is the research on data encryption, the other is on certification authentication.
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