Kategori: KamKo /Hankam

Info tentang seluk beluk KamKo (keamanan komputer) dari aspek manusia, peranti lunak, dan perangkat keras. A good way to approach each chapter, Piramida sistem komputer, Komponen keamanan komputer, Pendekatan tingkatkan keamanan komputer, Computer Today, information society, The Effect of Automation on Jobs, Steps to Protect Your Business;

Kamko 2

Source of personal data

•Some people fear that computer-based record-keeping offers too much of an opportunity for the invansion of an individual’s privacy. There is indeed reason for concern.
•For example, credit-card users unknowingly leave a “trail” of activities and interest that, when examined and evaluated, can provide a rather comprehensive personal profile.
From this information,
•A good analyst could compile a very accurate picture of your lifestyle. On a more personal level, records are kept that detail the duration, time, and numbers of all your telephone calls.
Violating the privacy of
personal information
•Most will agree that the potential exists for abuse, but are these data being misused? Personal information has become the product of a growing industry.
•Companies have been formed that do nothing but sell information about people. The use of personal information for profit and other purposes is growing at such a rapid rate that ..

Kamko 1

There is nothing wrong with
this attitude

•But we must recognize that society has made a very real commitment to computers. Whether it is good or bad, society has reached the point of no return in its dependence on computers.
•On the more personal level, we are reluctant to forfeit the every day conveniences made possible by computers.
controversy
•Another world for computer … Intense controversy is a by-product of the computer revolution. The emotions of both the general public and the computer community run high on computer-related issues.
•THE MISUSE OF PERSONAL INFORMATION: Source of personal data, violating the privacy of personal information, computer matching, securing the integrity of personal information.

Kamko 0

Computers in Society

Computers

•Can we live without them? Reaching the point of no return. There are those who believe that a rapidly advancing computer technology exhibits little regard for the future of human race.
•They contend that computers are overused, misused, and generally detrimental to society. This group argues that the computer is …
•Dehumanizing and is slowly forcing society into a pattern of mass conformity. To be sure, the computer revolution is presenting society with complex problems, but they can be overcome.
•Computer and information system have enhanced our lifestyles to the point that most of us take them for granted.

Keamanan Komputer 9

The motives of those who

•Would infect a system with a virus run from electronic vandalism to revenge to terrorism. There is no monetary reward, only the “satisfaction” of knowing that their efforts have been very costly to individuals, companies, and governments.
•Viruses are serious problem. They have the potential of affecting an individual’s career and even destroying companies.
A company that loses its
•Accounts receivables records could be a candidate for bankruptcy. Anti-viral programs, also called vaccines, exist, but they can be circumvented by a persistent (and malicious) programmer.
•The best way to cope with viruses is to recognize that they exist and to take pre-cautionary measures.
For example
•One company requires micro users to turn off their micros and reload their personal copies of the operating system before each use.
•In the main-frame environment, system programmers must search continually for suspicious-looking programs and be particularly wary of downloading programs from computer systems outside the company.

Keamanan Komputer 8

•For example, a student with an infected applications disk might infect several other laboratory computers with a virus which, in turn, infects the applications software of other students.
•Software companies have unknowingly distributed viruses with their proprietary software products.
In the mini-computer and …
•Main-frame environment, viruses generally are spread from one computer network to another.
•In late 1988 a Cornell graduate student wrote a costly virus (causing over $ 20 million in damages) that infiltrated 6000 computer on six continents via worldwide computer network.
Since first appearing in …
•The mid-1980s, viruses have erased bank records, damaged hospital records, destroyed the program in thousands of micro-computers, and even infected part of the systems at NORAD (strategic defense) and NASA.
•Disgruntled employee have inserted viruses in disks that were distributed to customers.

Keamanan Komputer 7

There are many types of viruses.

•Some act quickly by erasing user programs and data bases. Others grow like a cancer, detroying small parts of a data base each day. Some act like a time bomb. They lay dormant for days or months, but eventually are activated and wreak havoc on any software on the system. Many companies warn their micro users to back up all software prior to every Friday the thirteenth.
Some viruses attack the hardware
•And have been known to throw the mechanical components of a computer system, such as disk-access arms, into costly spasms.
•The most common source of viral infection is the public electronic bulletin board on which users exchange software. Typically, a user logs onto the bulletin board and downloads what ..
He or she thinks is a game,
•A utility program, or some other enticing piece of freeware, but gets a virus instead. One virus frequently distributed via electronic bulletin boards displayed “Gotcha” on the user’s monitor, then erased all programs and data from accesible disk storage.
•Viruses are also spread from one system to an other via common diskettes.

Keamanan Komputer 6

To maintain odd parity,

•The extra parity bit is turned on when the seven-bit ASCII byte has an even number of on-bits. When the ASCII byte has an odd number of on-bits, the parity bit is turned off.
•The receiving device checks for this condition. A parity error occurs when an even number of on-bits is encountered. Some computer systems are designed to maintain even parity, but odd and even parity work in a similar manner.
In a manner of speaking,
•Computers get sick, too. A variety of highly contagious “diseases” can spread from computer to computer, much the way biological viruses do among human beings.
•A computer virus is a program that literally “infects” other programs and data bases upon contact. It can hide duplicates of itself within legitimate programs, such as an operating system or word processing program.
Virus programs
•Are written with malicious intent and are loaded to the computer system of an unsuspecting victim. Viruses have been found at all levels of computing, from micro-computers to super-computers; however, the micro-computer environment is particularly suceptible to virus infiltration because of the lack of system controls exercised by individual users.

Keamanan Komputer 5

Parity checking

•Within a computer system, data in the form of coded characters are continuously transferred at high rates of speed between the computer, the input /output (I/O) and storage devices, and the remote workstations.
•Each device uses a built-in checking procedure to help ensure that the transmission is complete and accurate. This procedure is called parity checking.
Logically
•An ASCII character may have seven bits, but physically there are actually eight bits transmitted between hardware devices.
•The extra parity bit, which is not part of the character code, is used in the parity-checking procedure to detect whether abit has been accidentally changed, or “dropped”, during transmission. A dropped bit result in a parity error.

Keamanan Komputer 4

If that is not enough,

•Computer are the culprits behind our “conversations” with elevators, automobiles, and vending machines.
•IN OUR PROFESSIONAL LIVES, the computer is an integral tool in the performance of many jobs. Retailers query their computer systems to determine which products are selling and which are not.
Managers use
word processing systems
•To compose memos and to check spelling, grammar, and style.
•Geologists rely on “expert” computer system for guidance in the quest for minerals.
•Bankers examine up-to-the-minute securities information from their computer terminals.
•The overwhelming majority of people believe that computers enhance the quality of life.
People all over the world have
•Become committed to a better way of life through computers, and it is unlikely that the momentum toward this goal will change.
•CYBERPHOBIA. Fear of the computer is so widespread that psychologists have created a name for it: cyberphobia is the irrational fear of, and aversion to, computers. In thruth, computers are merely machines and don’t merit being the focus of such fear.