The passive authentication in digital images is a new technology.
数字图像被动认证是一种新兴的认证技术。
Traditional cryptography technology focused on the access control and confidentiality communications of digital products, but for authentication and copyright piracy tracing it is insufficient.
传统的密码学技术侧重于对数字产品的访问控制和保密通信，但是对版权认证和盗版追踪问题显得力不从心。
Digital library is research hotspot now in computer fields. This paper presents system integration and authentication technology based on Net library Among the Universities in Shanghai.
数字图书馆是当前计算机界研究的一个热点，本文以“上海市高校网络图书馆”为背景，介绍网络图书馆中所采用的系统集成技术和安全认证技术。
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