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Network Security Foundations phần 2

Kiểm soát mã hóa truy cập dựa trên giải quyết vấn đề yêu cầu hệ điều hành để phân xử truy cập vào dữ liệu an toàn. Ngay cả khi hệ điều hành đã được phá vỡ, các dữ liệu được lưu trữ vẫn còn mã hóa. Dữ liệu mã hóa có thể được truyền qua các phương tiện truyền thông công cộng như Internet mà không quan tâm đến sự riêng tư của nó. | Security Principles 17 Encryption-based access control solves the problem of requiring the operating system to arbitrate access to secure data. Even if the operating system has been circumvented stored data is still encrypted. Encrypted data can be transmitted over public media like the Internet without concern for its privacy. Terms to Know authentication bulletin-board systems BBS call-back security ciphers codes Data Encryption Standard DES encryption file firewalls hackers hacking mainframes operating system passwords private key protocols public key encryption PKE smart card trust provider Unix user accounts virus Windows worm 18 Chapter 1 Review Questions 1. What is security 2. What is the most common reason security measures fail 3. Why would vendors release a product even when they suspected that there could be security problems with the software 4. How many operating systems make up 90 percent of the operating system market 5. Factoring in the growth of the Internet at what rate is the number of computer security incidents increasing 6. Why weren t computers designed with security in mind from the beginning 7. During what era did hacking begin to occur en masse 8. In what year was public key encryption developed 9. Prior to the Internet how did most hackers share information 10. Why is it likely that applications other than those designed to implement security that concentrate on security will fail in the marketplace 11. What is the process of determining the identity of a user called 12. When a new computer is first set up how does the system know that the person setting up the computer is authorized to do so 13. What is the most secure form of authentication 14. How can a hacker circumvent permissions-based access control 15. How can a hacker circumvent correctly implemented encryption-based access control Chapter 2 Understanding Hacking Know thy enemy. Hackers are the reason you need to implement computer security and an in-depth defense against any .