说明文Two-dimensional code.doc

. INTRODUCTION:A. Topic: Two-dimensional code is a hidden disaster.B. Attention Grabber: Scanning two-dimensional code lets people get information easily. Two-dimensional code has already been a convenient way unconsciously. So, how could this convenient access be a hidden disaster? C. Thesis statement:1. The own features of two-dimensional code2. Two-dimensional is popular.3. It is convenient but it is a hidden disaster. .BODYA:First Main Point:The own features of two-dimensional code.1. Sub-point:Development of two-dimensional codea. Support Material: It develops from linear bar code and has black and white rectangles to deliver binary data. It is originated in Denso wave company in Japan which uses it to track car parts.b. Support Material: It is called low priced storage without computer chip. Because it not only use width record information but also use length which makes it can hold large amount of information. It can record 1850 capital letters, 2710 numbers or more than 500 Chinese characters. It also can record pictures, fingerprint and voices.2. Sub-point:Unique advantages of two-dimensional codea: Support Material:It is fault-tolerant. As long as the damage less than 50%, it can be recovered.b:Support Material: It has 3 locating points and can be read from any direction. B:Second Main Point: Two-dimensional code is popular because it likes keys which help us open the doors of information easily. With the clicks, information comes.1. Sub-point:The reason of popularization of two-dimensional code. a:Support Material:Because of the popularization of the smart phones, it is applied more often.b:Support Material: Social software can create users own two-dimensional codes which make contact much easier.2. Sub-point: Two-dimensional code is applied in many places.a:Support Material:The merchants use it to guide consumption and let customers know the information of products and service.b:Support Material: Logistics centers use it to know the position of parcels.c:Support Material: Passports, ID cards, membership cards all have two-dimensional codes to input information as soon as possible.C:Third Main Point: It is convenient but it is a hidden disaster. 1. Sub-point: It can be used by lawbreakers.a. Support Material: QR code is the abbreviation of quick response code. It is used to help users to visit website without entering URL. So lawbreakers can download the software which can create QR codes and cover these QR codes which transformed from malicious sites onto the original QR codes of public advertisements.b.Support Material: Maybe because it is hard to distinguish and very convenient, people are easy to relax vigilance.2. Sub-point:It can reveal personal information.a. Support Material: Because the real-name buying tickets system, peoples personal information can be easily revealed.CONCLUSIONA. Transition to end: Now we can see that two-dimensional code do has a lot of advantages, but