# The Application of Blockchain in Social Media: A Systematic Literature Review
## 6 Discussion
### Research Question Answers
The distributed feature of blockchains removes an individual group's regulation and hands total data management to the members. Decentralized consensus mechanisms, which are privacy protocols, thus offer a higher level of user privacy. The existing social media platforms have poor safekeeping, and users are vulnerable to attacks that are known to expose their individual information. Different studies have suggested several methods to address these issues (see Table 5). Similar to the models proposed for detecting fake content, the models proposed for protecting data use Blockchain-based elements such as smart contracts and consensus algorithms. [PERSON] et al. [45] recommended a novel truthfulness information storing system, CL-BC (Clark--Wilson), which contains a theoretical strategy, initial setting architecture, and comprehensive flux architecture to construct the entree regulator structure of a distributed veracity information storing system and optimize the safety of risks such as over-agreement and illegitimate completion in the storing of information. Smart contracts are deployed to ensure the integrity of predefined rules. [PERSON] et al. [53] suggested a way to handle the privacy setup on which a smart contract is employed to authenticate the modification in order to prove that the request is coming from the owner. [PERSON] et al. [55] suggested a blockchain application for use in OSN (online social networks). The safety of user data is preserved by averting the risk of data outflow from a centralized system. There is no risk of a centralized unit crashing the system as long as the system is decentralized. [PERSON] et al. [59] introduced a data mining system for social media based on blockchain concepts. This system offers safety and data mining exactness. The hash function is applied to encode social media content in order to increase its safety. \begin{table}
\begin{tabular}{c c} \hline \hline
**Reference** & **Proposed Model** \\ \hline
[45] & Model based on security data storage \\
[53] & Solution to managing the privacy preferences of a user \\
[55] & Autonomous decentralized online social network architecture \\
[59] & Blockchain-based data mining methodology \\
[60] & A blockchain-based privacy-preserving framework (BPP) \\
[62] & An auditable and trustworthy access control structure \\
[65] & A hierarchical blockchain-based attribute matching system \\
[68] & BCOSN, a blockchain-based Online Social Network \\
[70] & A decentralized social networking architecture \\
[71] & A blockchain-based model for data storage \\
[76] & An autonomous resource request transaction framework \\
[80] & Blockchain-enhanced version of social networking (BEV-SNSs) \\
[81] & Blockchain-based identity providers \\
[82] & A decentralized social network based on Ethereum and IPFS \\
[83] & RPchain, a blockchain based academic social networking platform \\
[84] & A protocol and authentication with a blockchain algorithm \\
[86] & Ushare: a blockchain scheme for social networks \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Proposed models for protecting data. [PERSON] et al. [60] used blockchain and public key cryptography methods to create a blockchain-based structure to safeguard privacy called BPP. It can accomplish secure information sharing, information recovery, and obtain information reasonably and without concern over potential harm to clients' interests. [PERSON] et al. [62] presented a perceptible and reliable access control model employing an ACL (access control list) to outline confidentiality rules. The client operates with a public key to express adaptable entrance regulator rules utilizing ACL. However, a private key connected with the client's Ethereum profile is employed to decode the confidential information when access authorization is confirmed on the blockchain. [PERSON] et al. [65] introduced a friend-matching architecture based on a hierarchical blockchain to guarantee the client's confidentiality.