## 5 Qualitative Analysis
### Blockchain-Based AI Use Cases
In addition, the privacy, security, and confidentiality of the solution are evaluated and compared with existing systems to demonstrate how the blockchain can improve trust and accountability [43]. In AI-powered educational systems, blockchain technology can help mitigate ethical challenges. The decentralized nature of blockchain combined with cryptographic techniques can protect sensitive educational data from unauthorized access and breaches, ensuring data privacy and security [41]. Blockchain can create a transparent and replicable record of data usage, for example, in educational AI applications, ensuring that data are used ethically and responsibly and fostering accountability [41]. Blockchain can enable secure and efficient data sharing between different educational institutions, promoting collaboration and knowledge sharing [41]. Furthermore, the immutability of the blockchain and its resistance to tampering can create trust in the authenticity and integrity of educational data, promoting reliability [41]. As advanced AI models contribute to the spread of fake news, blockchain-based systems can enhance social media news verification by permanently recording data, preventing manipulation and promoting accountability [44]. In such systems, the blockchain ensures the authenticity of news content by creating tamper-proof records and verifying the origin, integrity, and authenticity of news [46]. Therefore, the blockchain acts as an immutable and time-stamped database that prevents users from altering their activities, such as changing votes or news content retrospectively [44]. A consensus algorithm inspired by the \"Byzantine Generals Problem\", which requires a majority agreement among the participants, is proposed to vote on the truthfulness of news [44]. In addition, a truth validation mechanism for social media platforms based on [PERSON]'s moral formalism and consensus mechanism is implemented in the logical structure of blockchain-based smart contracts to allow for decentralized detection of fake news [55]. In addition to helping detect fake news, smart contracts can also improve financial services. Blockchain-based smart contracts enable automated condition-based financial transactions without intermediaries, reduce processing time and transaction costs, and streamline financial processes [58]. Financial services could benefit from higher reliability if double-entry bookkeeping is extended with blockchain [39]. In addition, blockchain enables a decentralized finance (DeFi) economy that aims to increase financial inclusion and strengthens the ethical implications of this technology for financial services [38]. In the supply chain, blockchain increases the authenticity of data, reduces information asymmetries, reduces the power of central players, and helps smaller players access market information [42]. The integration of blockchain in supply chains strengthens the trust of consumers in products and promotes ethical practices among supply chain participants through decentralized verification [36]. In drug supply chains, for example, the use of blockchain can make the manufacturing process of medicine more transparent and traceable, which, in turn, increases patient safety [35]. The decentralization aspect of blockchain, increased transparency, and the reduction of information asymmetries along the supply chains reduce unethical practices and promote sustainability [42]. Finally, blockchain can improve various public sector applications, such as by reducing fraud and increasing transparency in carbon credits, or improving security in voting and identity systems [45]. Blockchain is also discussed in the context of refugee registration, where it could help ensure that biometric data are securely and immutably stored and accessible [64].