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Security issues of a system are factors that need to be considered in the operation of information systems, which are intended to prevent threats to the system and detect and correct any damage to the system. Distributed Denial of Services (DDOS) is a form of attack carried out by someone, individuals or groups to damage data that can be attacked through a server or malware in the form of packages that damage the network system used. Security is a mandatory thing in a network to avoid damage to the data system or loss of data from bad people or heckers. Packages sent in the form of malware that attacks, causing bandwidth hit continuously. Network security is a factor that must be maintained and considered in an information system. Ddos forms are Ping of Death, flooding, Remote controled attack, UDP flood, and Smurf Attack. The goal is to use DDOS to protect or prevent system threats and improve damaged systems. Computer network security is very important in maintaining the security of data in the form of small data or large data used by the user.

The purpose of this study was to analyze the effect of education, personnel capabilities and top management support on the performance of the CV accounting information system. Kurogi Semarang. The population in this study are all employees of CV. Kurogi Semarang, namely as many as 60 employees. The technique of determining the sample is purposive sampling method. The number of samples in this study were 40 employees. This research data analysis tool uses multiple linear regression. The results of the analysis show that education has a positive effect on the performance of accounting information systems. This is evidenced by the calculated t value which is greater than t table, namely 2.359 > 1.688, with a significant value of 0.024 <0.05. Personal ability has a negative effect on the performance of accounting information systems. This is evidenced by the t-count value that is greater than t-table, namely -2.421 (signed negative) > 1.688, with a significant value of 0.021 <0.05. Top management support has a positive effect on the accounting information system. This is evidenced by the t-count value that is greater than t-table, namely 4.467> 1.688, with a significant value of 0.000 <0.05.

At the Health Center an electronic medical record information system (RME) is used in the department registration, poly general, poly elderly, poly tooth, poly MCH, room integrated, room mtbs, psychology, physiotherapy, laboratory and nutrition. Perceived use describes the extent to which they can accept A technology specifically system record medical electronic (RME). Objective study This For analyze how much the perception and use of the electronic medical record information system (RME), how simple and easy it is to implement an electronic medical record information system (RME). And how much big enhancement performance can achieved blessing exists system information That, so analysis with the Technology Acceptance Model method was used . The type of research that used is descriptive analytic. Collection And study with use, observation And questionnaire. The subject population in this study were 30 officers who use information systems RME. The object of this study is the implementation of the Electronic Medical Record Information System. Results between independent variables and dependent variables on system users RME information did not have a significant effect, namely 0.813 No according to decision. Simple linear regression test where Ho is greater than 0.05 then the hypothesis beginning rejected that No There is influence between variable free to variable bound in user RME information system.