Design Patterns and Object-Oriented Models of a Civil Biometric Service System

The number of background and security checks in civil applications has increased dramatically in recent years. Most of those civil applications use the local and federal law enforcement agencies＇ databases. Because of the unpredictable civil application requirements and the development of new technologies, the biometric industry is apposite to use the design patterns and object-oriented analysis in developing and managing such dynamic and complex systems. This article presents the use of the design patterns as a common way to organize objects to make practical design decisions helping to generate flexible, manageable, and agile biometric software architectures. First, a conceptual model is presented modeling an Electronic Fingerprint Service （EFS） for civil applications based on object-oriented design. Then the model is demonstrated by applying design patterns and shows that the system can gain the flexibility and agility to expend and adapt to new biometric technologies and applications in an Electronic Biometric Service （EBS） system. Two cases are used to demonstrate the proposed method. This analysis and design interaction leads to the application of the design patterns by reusing the object created in the EFS model. The two case studies demonstrate how design patterns applied to the EBS model and show they can achieve flexibility and object reusability （agility） while maintaining the integrity and security of the main system model.     

生物识别技术浅析

生物特征识别技术作为一种身份识别的手段,具有独特的优势,对信息安全具有重要意义,近年来已逐渐成为研究热点。文章介绍了常见的生物识别技术和识别方法并阐述了每种方法的优缺点。     

2FSK信号"指纹"特征的研究

人有表示个体属性的指纹特征 ,无线电通信信号 (下称信号 )是否存在描述个体电台的电子“指纹”特征 (下称“指纹”特征 )呢 ?文中分析了信号“指纹”特征存在的可能性 ,并以 2FSK信号为例 ,论述了 2FSK信号应具有的“指纹”特征 ,同时提取了其中部分“指纹”特征。