There are hundreds of methods to remotely gain unauthorized access to computer systems over a network. If the network is the public Internet, then virtually anyone in the world can get access. Networks and telephone systems are easily tapped, which provides access to much crucial data or the knowledge needed to obtain direct access to the enterprise's computer systems Modification includes tampering with information once access has been achieved by changing software or hardware controls or the data itself. Think of the consequences if an intruder changed the amounts owed to your company by outside vendors. All of your billings will be incorrect and the cash flow totally disrupted.
Fabrication means fraud and counterfeiting.
It is modification in a way to benefit the intruder or to cause problems for the corporation. It can involve skillfully adding data or objects to the computing system such as transactions or additional files on a database. An example of data tampering is accessing a university data base to change the grade received in a class. Or planting compromising email messages that could benefit a sexual harassment lawsuit. Damage Assessment 5.