本文首先介绍网络数据库安全的基础：即现代密码学和数据库安全，接着介绍了指纹特征在身份认证中的原理。
The thesis introduce the base of network database security, which includes modern cryptology and database security, and introduce principle of fingerprint characteristic in identity identification.
从房地产评估系统的特点出发，从身份认证、访问控制和数据库备份三个角度来考虑评估系统安全问题。
Based on the characteristics of real estate evaluation system, system security solution from identity authentication, access control and data backup are discussed.
当前一些大型网络数据库管理系统（DBMS）的安全性方法主要包括：身份认证、访问控制、审计跟踪和数据备份，但对一些更为敏感和重要的数据，还需要进行数据加密或者容灾系统的设计。
The major Security methods in DBMS are as follows: identification, visiting control, trace of audit and copy of database, but as to the sensitive and important database, it needs to be coded.
当前一些大型网络数据库管理系统（DBMS）的安全性方法主要包括：身份认证、访问控制、审计跟踪和数据备份，但对一些更为敏感和重要的数据，还需要进行数据加密或者容灾系统的设计。
The major Security methods in DBMS are as follows: identification, visiting control, trace of audit and copy of database, but as to the sensitive and important database, it needs to be coded.
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