TAILIEUCHUNG - o reilly Web Security & Commerce phần 2

ngăn chặn các phần mềm, công nghệ kiểm duyệt, và các vấn đề dân sự và hình sự có liên bảo mật trong một Nutshell Web Security Vấn đề thẻ tín dụng, mã hóa, và tường lửa Web: Một phần của Giải pháp Quản lý rủi ro | Securing Windows NT 2000 Servers for the Internet Part II User Safety This part of the book discusses some of the threats to people who use web browsers to access information on the Internet. It draws its examples primarily from Netscape Navigator and Microsoft Internet Explorer although the material covered is applicable to later versions of those products as well. page 29 Securing Windows NT 2000 Servers for the Internet Chapter 2. The Buggy Browser Evolution of Risk Web browsers are extremely complex pieces of software that seem to be getting more complex all the time. Every time new features are added there are more chances for something to go wrong. That s good news for crooks and attackers and bad news for people interested in web security. Most security bugs are fundamentally programming bugs. Fortunately by understanding the real risks of browsers it is possible to manage many of their associated risks. Browser History The first web browsers were developed by scientists at CERN for publishing papers about high-energy particle physics. These early browsers could display web pages containing text and links to other pages of text. The pages were created with a WYSIWYG What-You-See-Is-What-You-Get editor written for NeXT computers and stored in HTML files. Mosaic the browser created at the National Center for Supercomputing Applications introduced the ability to display forms and simple widgets with text fields push buttons radio buttons and pull-down menus. Combined with CGI Common Gateway Interface forms and widgets gave web programmers a kind of generic user interface. It was simple Display a form have the user fill in some fields press a button and display a new form with new fields to be filled in. The Return of Block Mode There was nothing fundamentally new about the web s style of computing IBM computers were doing it in the 1970s on 3270 terminals. Called block mode this style of computing involved a simple three-step process 1. .

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