Introduction to blockchain technology

What a blockchain actually is, how blocks link together, why old records are so hard to change, and the different kinds of chain. You'll open real Vaulta blocks on an explorer. No account, no money.

• Explain a blockchain in plain words: a shared record that many computers keep and check together.
• Say what goes into a block and how a hash links each block to the one before it.
• Explain the difference between signing and encrypting, and which key does what.
• Open a block on a public explorer and read its number, ID, producer and time.
• Tell public, private, permissioned and permissionless chains apart, and say when a normal database is the better tool.