Besides hash functions, the blockchain uses another base technology extensively: asymmetric cryptography. It is the foundation for identifying users in the blockchain and protecting their property. Cryptography is often considered complicated and hard to understand. Hence, this step focuses on introducing cryptography in a gentle way that is easy to comprehend and sufficient for understanding the security concept of the blockchain.
The Metaphor
Long before e-mails, facsimiles, telephones, and chat apps were invented, people used conventional ...
