The vast usage of blockchains necessitates a chapter dedicated to the topic. The versatility that blockchains have tempts users to try their hand at implementing them in the various areas of our lives. Though sometimes it might seems tedious, using decentralized ledgers to store and handle data is actually very convenient and safe, to a certain extent. Accessing these ledgers over a network to perform activities such as transactions or signing documents makes it a feasible method of conveying data without actually doing much.
This chapter will focus on the following topics:
- User identity and storing sensitive data on a blockchain
- Dealing with large files on a blockchain
- User identity verification on a blockchain
- Signing a document on a blockchain
This chapter is more theoretical than some of the others as a lot of it depends on the backend technologies that we choose to work on.