The development of Information Technology (IT) is now very rapid and has been used in various aspects of life both in the field of government, banking, socio- cultural, industrial, education, and even health. One type of disease that gets attention for the application of IT is corona virus or better known as Covid 19 because the spread is quite widespread throughout the country, especially in the territory of Indonesia. Corona virus disease development in Indonesia is growing, based on WHO data as of today on August 30, 2020 positive cases have reached 172,053 people, cases died 7,343 people and recovered 124,185 people and the number of cases is increasing every day. Based on these conditions, Central Aceh is in a state of alert against the threat of corona virus. then a form of prevention  of the widespread spread of the virus can be done by breaking the chain of transmission by doing social distancing. In this study, a system will be designed to anticipate the Covid-19 pandemic by predicting the rate of spread of covid-19, especially in central Aceh districts using the Naive Bayes Classifier method. The accuracy level of this system is a positive case of 60%.

The main problem to be an obstacle in communication between platforms, networks such as local networks or the Internet is a problem in data transfer. The problem often found in a hardware which is cannot receive data that is processed by other hardware. So to change data between two computer systems, it is necessary to convert data from one form to another. One solution to this problem is transfered data or file, previously converted to the plaintext form first. Conversion to the plaintext form can be supported by most computer systems. In this study, a software was designed using Visual Basic programming language that can convert binary files to plaintext using the Base 64 encoding or decoding method, UUEncode / UUDecode, XXEncode / XXDecode, BinHex 4.0, Hexadecimal, and Quoted-Printable. The results of the design is produce a software that can be used as an alternative program to convert files into text files, besides that the program can also display a benchmark comparison graph (speed) of each method and comparison of overhead (the ratio of the size of the file to the file before encoding).