Understanding elliptic curves contributed to solving mathematical problems in number theory that had been unsolved for centuries. Elliptic curves were also used in solving one of the millennial problems, which is Fermat's last theorem. They are also connected with many hypotheses and problems in mathematics that have yet to be solved. Elliptic curves defined over finite fields are widely used in public key cryptography, since they have proven to be groups that have the best properties for implementing the Diffie-Hellman protocol. This article provides an overview of the theoretical assumptions that are necessary for the development of cryptographic algorithms based on elliptic curve cryptography, which includes defining elliptic curves, defining the properties of arithmetic operations on elliptic curves used in cryptography with reference to curves defined over finite fields.

This paper presents the binary symmetric channel as a common model of the communication channel used in theory of coding and theory of information. Since there is no noise in the channel, the data transmission delay is very small, which is why data can be transmitted quickly and in real time, without many errors, which greatly determines its practical application. Therefore, the theoretical basis of the functioning of the channel itself and its practical advantages will be presented in the text. The concept of binary coding will also be explained with the use of block codes that create the possibility of correcting eventual errors, as well as the application of a binary symmetric channel in improving signal interference when using a wireless network.

The laws in Bosnia and Herzegovina that partially regulate the subject areas are outdated, long since overcome and almost completely non-functional, which effectively prevents the introduction of new technologies, which are becoming more and more convergent day by day with the development of digital services that are based on various types of electronic communication infrastructure. This type of legislation in Bosnia and Herzegovina discourages investors from investing in the development of communication infrastructure, which ultimately leads to limited service or lowquality service for the citizens of Bosnia and Herzegovina. High-quality and modern regulation of the field of electronic communications is achieved first of all so that all legislative levels in Bosnia and Herzegovina, in accordance with their constitutional competences, pass complex and detailed laws that will regulate the field of electronic communications, following the example of the legislative achievements of the European Union in this areas. Bearing in mind the past experiences in Bosnia and Herzegovina, probably a more functional way is for all legislative levels in Bosnia and Herzegovina, in accordance with their constitutional competences, to pass laws that will regulate the field of electronic communications in such a way as to prescribe the basic principles and basic frameworks of regulation this area, again following the example of the legislative achievements of the European Union in this area.

In today’s modern shipping business environment, there is a shift from traditional to digital marketing. Social media has the most significant potential for companies to reach consumers; thus, this paper aims to discover the intensity and content of the marketing activities of shipping companies through social media. Two different types of companies, the container and multi-purpose ones, are the objects of research, primarily analyzed based on the number of followers, posts, likes, comments, and shares on social media.
The results show the highest intensity of Facebook usage for shipping companies. It was also discovered that shipping companies actively use Facebook, and this form of online representation is considered more precise regarding brand awareness and public engagement. The content analysis revealed that shipping companies have no intention of selling services using social media. Namely, there are limited network-building or customer relationship efforts, but activities in Corporate Social Responsibility activities, Employee Brand Management, and Sustainability increase.
The paper revealed that shipping companies use digital marketing toward the internal public and employees, increasing marketing and human resource management activities.
This paper opens up the possibilities of a more significant application of marketing in the shipping industry, bearing in mind the trends of digitization of maritime operational processes and supply chains.

An administrative contract is a specific contract with a special legal regime, subjects and characteristics that classify it as an institute between private and public law. The paper presents a comparative analysis of the general principles of contract law, and above all civil (private) law and administrative contract. This analysis should answer the questions of the basis of the contractual obligation, ie the basic elements that create a contractual obligation. The paper presents the most important principles, as well as general elements of the contract on the one hand and basic characteristics of the administrative contract on the other, in order to better understand their legal nature, similarities and differences, especially the legal nature of the administrative contract and its place in contract law.

The paper analyzes the position of national minorities in the Western Balkans region, with an emphasis on the countries created through former SFR Yugoslavia’s dissolution, which are characterized as new national states. It has been pointed to the specificities of this form of national state, primarily nationalism as the basis in all the domains of functionality, which is the main reason for the negative relation toward minorities. The accession to the European Union is the main motivation factor toward solving the issues of the minorities in this region. The situation in Bosnia and Herzegovina is especially complicated considering that the specific solution of national minorities’ status is one of the causes of stagnation of this country in European integration process.

As a potential candidate for membership in the European Union and Bosnia and Herzegovina, a country committed to the Euro-Atlantic integration process has committed itself to strengthening the rule of law and strengthening institutions in the field of justice and home affairs. One of the important activities in this process is the adoption and implementation of public policies in the field of combating money laundering, bearing in mind that this social scourge in its manifestations is the greatest threat to the stability and smooth functioning of a country. Money laundering is a global problem of the twenty-first century. As a form of economic crime, the money laundering process is represented both nationally and internationally. 
Although there are a large number of definitions of money laundering, it can be said that it consists of shorter or longer movements of funds acquired through illegal activities, in order to obtain seemingly legal means through the cycle of transformation. The complexity of the fight against money laundering and the problems of combating various forms of money laundering go beyond the possibilities and efforts undertaken by the competent authorities and government institutions. All countries should go ahead of money launderers, that is, they should go ahead in designing and prescribing methods and ways of fighting, but they should also not allow criminals to use a corrupt and unregulated institutional framework and gain lucrative money laundering income.

Village – Owned Enterprises (BUMDes) was developed to increase the village revenue and drive the people’s economy through resource and village asset management. The existence of BUMDes is expected to improve village potential and become a pillar of the community’s economy. Not only oriented on increasing the village local revenue, but BUMDes must also have a social mission to help the villagers, especially during the COVID-19 pandemic. The study method employed was descriptive qualitative, and the data were collected through interviews, observations, and documentation. Informants were selected through purposive sampling out of the various parties related to BUMDes in the Polanharjo Sub-district, Klaten District. The results of the study showed that the mass development of BUMDes as a top-down policy without any consideration of the local potential of each village has caused a lack of support from the community and has led to the lack of development of BUMDes, making many lapses into a stasis. However, there are a few BUMDes that were able to develop well, making them a motor for the village economy during the COVID-19 pandemic through their various business enterprises. The BUMDes units that have succeeded to grow and develop are those that could identify the local potentials and resources through various innovations, receive social support through their people’s participation and build partnerships with many parties such as the village government, private sector, and the community in the form of collaborative governance.

The way to clarify the concept of the human resources competence of The Indonesian National Police (POLRI) is believed to be a key factor in determining the success of the police organization. Currently, POLRI has implemented an open position promotion program which one of the stages uses the Assessment Center to exam managerial competence. This research aims to analyze the policies and impact of assessment center implementation in supporting of the open positions promotion. The Researchers apply qualitative approaches with data collection techniques in the form of observations, interviews and document studies. The results of the study findings concluded that the Assessment Center implementation policy in support of open promotion in the narrow sense has been implemented although incomplete. In a broad sense, the implementation of assessment center policies in supporting of open promotion has not been successful and has not given a positive impact. This is because The Indonesian National Police as a bureaucratic organization, does not fully have the organizational capacity that is the backbone of bureaucracy, which involves: organizational structure; mechanism of work; human resources; financial support as well as resources needed to work. These four elements have not been able to realize optimal conditions and support each other.

The main focus of disaster management is currently on disaster risk reduction activities. Mount Merapi in Indonesia is one of the most active volcanoes in the world with a four-year eruption cycle. The local government of the Sleman Regency has made several efforts to reduce the risk of impacts from the eruption of Mount Merapi. These efforts involve various elements in society. The purpose of this research is to identify the efforts made by the Sleman Regency Government in reducing the risk of the eruption of Mount Merapi and the factors that influence it. This research uses descriptive qualitative research methods with informants coming from the government, volunteers and the community. The findings of this study are the activity of risk reduction of eruption Merapi Mount in Sleman consists of physical and non-physical mitigation. Physical mitigation includes the construction of the Merapi Sabodam, construction of the Early Warning System, determination of evacuation routes and construction of refugee shelters. Non-physical mitigation includes the preparation of a contingency plan for the eruption of Mount Merapi, the formation of Destana (Disaster Resilient Village), the sister village and sister school program, the establishment of a disaster safe education unit, the establishment of the Operational Unit and the Implementing Unit for disaster management. The program is run by the government along with non-state actors to be affected by the starting conditions of each party, ability to combine the resources owned by each party, to shared information and commitment to a common purpose.