Social media is rapidly developing in many folds, but as its growth expands, many issues are also growing. Some severe issues in social media are data security and less privacy because of its centralized nature, which exploits user information. As these are some biggest problems in social media, technologists associated blockchain technology with social media to provide security and privacy in all transitions of social media networks, which have the property of decentralization and strong end-to-end encryption to avoid tracking the user from third-party attacks. We can use distributed ledger-based payment infrastructure for fast processing of payment in real time to prevent the data from any fraud or a security breach and improve payment security significantly. Blockchain provides transparent payment flow to enhance the payment systems but still has many concerns which can be quickly dealt with to get maximum benefits of this technology. In logging or registering a legitimate user in social networks, we use two-factor authentication principles, which reduce the risk of an account being compromised and prevent an expropriating of a legitimate account and posting malicious content. To avoid all these pitfalls, the identification process should be very strong, and it should be capable enough to validate history. This system should not encourage people to overemphasize or lie about their history.

In today's society, social networks are becoming increasingly popular. Social networking platforms have paved the way for billions of users to build connections with their family, friends, and colleagues. In addition, these sites have become a hub for exchanging job searching, entertainment, and education information among people. These platforms provide the smooth flow of these services from one geographical border to another by allowing users to update their data, interact with each other, and browse other users' profiles. However, sharing personal information over social networking platforms creates security issues for their users. This chapter provides a thorough examination of several security risks affecting Internet users. We also offer challenges social networking platforms face in numerous fields. We then discuss the emerging trends in social networking platforms. Lastly, we also mentioned the existing solutions to security risks that affect the social networking platforms.

Blockchain is one of the most disruptive and emerging technology in the present era, due to its unique characteristics immutability and decentralization. The transactions in a blockchain are publicly available, thereby accessible to all users. So, the privacy provisioning in blockchain for transactions of decentralized social media as well as privacy of the identities of members is needful. The chapter provides a comprehensive study of privacy provisioning on the blockchain. In the existing literature, there are a variety of scalability, security, and privacy concerns with blockchain, including key management for recovery, on-chain privacy protection, transaction linkability, and adherence to privacy laws. Following the self-sovereign identity (SSI) model, new privacy-preserving blockchain solutions are emerging to address these issues. These solutions allow users to anonymize themselves in all types of electronics transfer ledgers and regain control of their personal information. This chapter provides a comprehensive study of privacy provisioning schemes along with their challenges in this fascinating and disruptive technology.

The integration of Blockchain (BC) technology with 5G networks is newly emerging area. Driven by the dramatically increased capacity of 5G networks and recent breakthroughs in BC technology, 5G services are expected to contribute to rapid development and bring significant benefits to future society. Multimedia communication can potentially reach a wide range of areas and touch people's lives in profound and different ways. In recent years, great progress has been made in defining approaches, architectures, standards, and solutions. 5G applications have evolved significantly, including voice, video, wireless, information access, and social interaction networks. More interestingly, BC helps establish secure multimedia communication among users and potentially reduces communication latency, transaction costs, and provides global accessibility for all users. Today, social media is a platform for establishing connections, sharing content and social interaction of a huge number of users. Digital media has changed the way we connect and share our experiences. Multimedia content is a key ingredient of social media, and BC integration optimizes content management and immersive communication.

Our aim in the chapter is to discuss the opportunities, challenges, and prospective solutions that BC-based 5G technologies are expected towards the 6G era. An overview of the BC technology in communication systems along with key features of multimedia communication is given. Several aspects of BC integration in 5G such as interoperability and standardization requirements, application and services, security and privacy, robustness and data integrity, resource allocation and management as well as energy efficiency, are analyzed. As concluding remarks, we identified some open issues and future research directions that should be considered in more innovative solutions and studies in this promising area.

Elections play a crucial role for a democratic country. However, there is wariness among the people of these democratic countries over their electronic voting systems which further is a major issue for these citizens. Rigging votes, EVM hacking, vote manipulation are some of the major concerns among the people with the electronic voting systems. These shortcomings need to be addressed in order to achieve widespread adoption. Blockchain technology can be used to address these problems. Blockchain offers decentralized nodes that can be used for electronic voting and hence provide a complete framework for voting because of its end on verification benefits. With the blockchain technology, voting solutions can be created which are distributed, non-repudiated, and security protected. This chapter gives an insight to the existing vote-cast system using blockchain technology. The current state-of-the-art of blockchain architecture for voting-cast systems are presented. The blockchain architecture fundamental concepts and its characteristics are discussed with respect to the social opinion vote-cast system.

Social media has influenced almost all computing domains including information communication. The most benefited areas are entrepreneurs, startups, and other business domains. Social media has not only transformed the Business, rather, sectors such as healthcare are equally benefited to a large extent. The "idea generation" by intellectuals (active in social sites) is a fundamental source of social media to address enormous issues of the society. Nevertheless, having a tremendous potential for social media this field is not harnessed up to the maximum extent due to the limitations imposed in terms of identity fraud, misinformation, and fake news. To address the above breaches, blockchain technology which is well established in the computing domain would be beneficial to a large extent. Blockchain technology which is known for transparency, ensuring confidentiality, and security have scope to alleviate the capabilities of social media computing.