It is an investigation to review the performance of an operational device. The objectives of undertaking a system audit are as follows −
Data processing auditors audits the usage of computer system in order to control it. The auditor need manage data which is obtained by computer system itself.
The role of auditor starts on the initial stage of system development so that resulting system is secure. It describes an idea of usage of system that may be recorded which allows in load planning and choosing hardware and software specs. It gives an indication of wise use of the computer system and possible misuse of the system.
An audit trial or audit log is a protection record which is comprised of who has accessed a computer system and what operations are performed during a given period of time. Audit trials are used to do specific tracing of the way data at the system has changed.
It presents documentary evidence of various control techniques that a transaction is subject to throughout its processing. Audit trials do not exist independently. they are carried out as a part of accounting for recovering lost transactions.
Auditing can be done in two different ways −
Audit concerns examine the results of the analysis by using the use of both the narratives and models to identify the problems caused due to misplaced functions, split processes or functions, broken information flows, missing data, redundant or incomplete processing, and nonaddressed automation possibilities.
The sports below this phase are as follows −
System security refers to protecting the system from theft, unauthorized access and changes, and accidental or accidental harm. In automated systems, security involves protecting all the parts of computer system which includes data, software, and hardware. systems security includes system privacy and system integrity.
There are variety of control measures which can be broadly classified as follows –
A risk is the possibility of losing something of value. risk analysis starts with planning for secure system by identifying the vulnerability of system and effect of this. The plan is then made to manage the chance and cope with disaster. it is done to accesses the possibility of possible disaster and their cost.
Risk analysis is a teamwork of experts with different backgrounds like chemicals, human error, and method equipment.
The following steps are to be followed whilst conducting risk analysis −
As the risks or threats are changing and the potential loss also are changing, management of risk must be performed on periodic basis through senior managers.
Risk management is a continuous process and it involves the following steps −
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