电子商务英语课件6.ppt

6.1 the Internet Security of Electronic Commerce6.1.1 Network and Electronic Commerce In the early days of the Internet, one of its most popular uses was electronic mail. Despite e-mail s popularity, people have often worried that a business rival might intercept e-mail message for competitive again. Another fear was that employees’ non-business correspondence might be read by their supervisors, with negative repercussions. These were significant and realistic concerns. Today, the stakes are much higher. The consequences of a competitor having unauthorized access to messages and digital intelligence are now far more serious than in the past Electronic commerce, in particular, makes security a concern for all users. A typical worry of Web shoppers is that their credit card numbers might be exposed to millions of people as the information travels across the Internet. Recent surveys show that more than 80 percent of all Internet users have at least some concern about the security of their credit card numbers in electronic commerce transactions. This echoes the fear shoppers have expressed for many years about credit card purchases over the phone. 6.1.2 Computer Security Classifications Computer security is generally classified into three categories: secrecy, integrity, and necessity (also known as denial of service). Secrecy refers to protecting against unauthorized data disclosure and ensuring the authenticity of the data source. Integrity refers to preventing unauthorized data modification. Necessity refers to preventing data delays or denials. Secrecy is the best known of the computer security categories. Every month, newspapers report on break-ins to government computers or theft and use of stolen credit card numbers that are used to order goods and services. Integrity threats are reported less frequently and, thus, may be less familiar to the public. For example, an integrity violation occurs when an Internet e-mail message is intercepted and its