楼主
大 中
小 发表于 2007-3-19 14:23 只看该作者
[转载]AN OVERVIEW OF BIOMETRICS
原始出处： http://ctl.ncsc.dni.us/biomet%20web/BMOverview.html
AN OVERVIEW OF BIOMETRICS
| | | Identification and verification have long been accomplished by showing something you have, such as a licence or a passport. Sometimes it also required something you know, such as a password or a PIN. As we move into a time when we need more secure and accurate measures, we begin to look at using something you are: biometrics. | | | Definition:
| Biometrics is the development of statistical and mathematical methods applicable to data analysis problems in the biological sciences.
The term "biometrics" is derived from the Greek words bio (life) and metric (to measure). For our use, biometrics refers to technologies for measuring and analyzing a person's physiological or behavioral characteristics, such as fingerprints, irises, voice patterns, facial patterns, and hand measurements, for identification and verification purposes. [more about the history of biometrics] | | | Uses Of Biometrics:
| Biometrics are used in two major ways: Identification and Verification.
Identification is determining who a person is. It involves taking the measured characteristic and trying to find a match in a database containing records of people and that characteristic. This method can require a large amount of processing power and some time if the database is very large. It is often used in determining the identity of a suspect from crime scene information.
Verification is determining if a person is who they say they are. It involves taking the measured characteristic and comparing it to the previously recorded data for that person. This method requires less processing power and time, and is often used for accessing places or information. | | | How It Works:
| Biometric devices consist of a reader or scanning device, software that converts the gathered information into digital form, and a database that stores the biometric data for comparison with previous records. When converting the biometric input, the software identifies specific points of data as match points. The match points are processed using an algorithm into a value that can be compared with biometric data in the database. [frequently asked questions] | | | Types of Biometrics:
| There are two types of biometrics: behavioral and physical. Behavioral biometrics are generally used for verification while physical biometrics can be used for either identification or verification.
Examples of physical biometrics include:
Examples of behavioral biometrics include:
|
曾几何时，有人对我说：装B遭雷劈。我说：去你妈的。于是，这个人又对我说：如果再说脏话，上帝会惩罚你的。我说：我操上帝。结论：彪悍的人生不需要上帝。
|
