Little prior knowledge is needed to use this long-needed reference. Computer professionals and software engineers will learn how to design secure operating. BUILDING A SECURE COMPUTER SYSTEM Morrie Gasser ACF2 is a trademark of Uccel Crop. AOS is a trademark of Data General Corp. DEC, PDP, VMS. : Building a Secure Computer System () by Morrie Gasser and a great selection of similar New, Used and Collectible Books.

Author: Sakree Nagar
Country: Burundi
Language: English (Spanish)
Genre: History
Published (Last): 7 December 2009
Pages: 92
PDF File Size: 9.76 Mb
ePub File Size: 1.71 Mb
ISBN: 190-8-60773-608-7
Downloads: 19054
Price: Free* [*Free Regsitration Required]
Uploader: Vulabar

ACSA Information Security Bookshelf – Gasser

Reference Guide for Security in Networks Reference Guide for Security in Networks This reference guide is provided to aid in understanding security concepts and their application in various network architectures. Nonetheless, most computer facilities continue to protect their physical machine far better than they do their data, even when the value of the data is several times greater than the value of the hardware. Ohio Supercomputer Center Original More information.

In order to attain such a high rating, a system has to be designed with security as its most important goal. Messerschmitt Supplementary section for Understanding Networked Applications: But passwords are inappropriate for many of these applications, especially when a single password is issued to several people for access to a common file, for example.

The nature of all components within the security perimeter must be precisely defined, because a malfunction in any one can lead to a security violation; in contrast, the nature of the components outside the perimeter is rather arbitrary, subject only to constraints enforced at the time they Pethia Software Engineering Institute S.

Many of these controls do not substantially increase the security of the system, but they do foster the notion that security is painful. To sum up, security relates to secrecy first, integrity second, and denial of service a distant third. Homeland Security Red Teaming Directs intergovernmental coordination Specifies Red Teaming Viewing systems from the perspective of a potential adversary Target hardening Looking for weakness in existing.

Miller The Internet and World Wide Web are storehouses of information for many new and legitimate purposes. Type enforcement is a new security More information. Getting Started More information.

You may forget that half of your security problem is a matter of keeping your users isolated from each other not keeping outsiders out.

Although reliable operation of the computer is a serious concern in most cases, denial of service has not traditionally been a topic of computer security research. A few commercial vendors are now undertaking to fill the void. These procedures allow the government to assign different degrees of trust to different people, depending on the needs of their particular job and the depth of their investigation. The Infor CloudSuite team uses best-practice protocols and a thorough, continuous.


A description of the security enhancements ggasser by Digital Equipment to upgrade security on its VMS operating system. Often the requirements ultimately expressed are inconsistent with the original goals of the program, leading to unfortunate design compromises.

In order for a system to be assigned sywtem rating, it must meet all the technical requirements for its class in the four areas of security policy, accountability, assurance, and documentation. One misconception fortunately short-lived computeer data encryption; that is, encoding information using a buildin or secret key so that it cannot be deciphered by unauthorized individuals.

Section lists additional ways in which passwords may be misused. If the information is valuable enough to a penetrator to warrant the effort, there is little reason to assume that the syystem will not gasxer. But these organizations often fail to recognize that the computer can eecure against flawed procedural controls. Government Printing Office number The DoD criteria for evaluating and rating operating systems according to a scale based on security features and assurance.

This change will not only yield a scalable. Few of the penetration techniques used by various tiger teams charged with finding security holes in systems would be thwarted by encryption. Such enhancements, made to existing systems at minimal cost, often result in reduced convenience or poor performance. Several vendors have made a considerable investment in internal security enhancements to their operating systems without cost add-ons. It may, however, be able to defeat attempted incursions by unauthorized terminals, modems, or users who access the system remotely, as long as they are constrained to enter the system according to the rules of the system interface.


Denial of service can be defined as a temporary reduction in system performance, a system crash requiring manual restart, or a buildibg crash with permanent loss of data.

National Computer Security Center.

Does your system have a connection to a commercial network from which users can log in? This paper describes the security. Some sophisticated features appear in research systems that are used daily at universities, proving that the concepts are viable, but for various reasons not the fault of the researchers the systems remain one-of-a-kind.


Where selective access to information is required, it is determined on a case-bycase basis. Developments are often targeted to a specific model of computer or operating system, and inconsistent levels of funding have stretched out programs to the point where the original target system is technologically obsolete by the time the program is ready for implementation.

It is not possible in one book to treat all applications of security while retaining the technical depth needed to cover each topic adequately. Trusted System Evaluation Criteria Ratings.

All bets are off, however, if something that should not be there bypasses the external controls and enters the system or if the system is threatened from the outside in an unanticipated way. Many would address the problem through better control of personnel, better administrative procedures, and more suitable laws; others believe that technical solutions are most appropriate.

Traditionally, computer facilities have been physically protected for three reasons: Programs originally intended for research have been wrongly criticized for not fulfilling needs of production systems. Office of Energy Assurance U. Chapter 1 What is Computer Security? From a high-level standpoint, attacks on computer systems and networks can be grouped More information.

Before the problem of data security became widely publicized in the media, most people s idea More information. For a number of years many were lulled into the belief that computer security was a people problem that could be addressed by encouraging people to follow the rules of the road.

If one of your users accesses your system via a modem on a personal computer, how do you ensure that the personal computer has not been penetrated by an outsider via that modem? The idea is that you telephone a computer from your home or office terminal and identify yourself via a password to the modem on the remote computer through your terminal. Tamsyn Barrett 3 years ago Views: Loss of this data, conveyance.

Now, as more businesses connect to the Internet as a service to their internal.