Discuss the integration of IoT with blockchain technology. What benefits does blockchain offer to IoT applications, particularly in terms of security and data integrity?

‘A blockchain is a decentralized and distributed digital ledger of records across a network, sometimes public and sometimes private. These digital records are called blocks, and they record transactions across different computers. Blockchain works by ensuring no block can be altered retroactively without the alteration of all subsequent blocks. Using blockchain technology, users can confirm transactions without needing a central authority, like a bank.’   Referring to the quote above, perform a case study and discuss the fundamental of Blockchain by providing suitable example and applications.

How does "blockchain technology" contribute to the decentralization and security of public key infrastructure (PKI) systems?

Explain the concept of 'blockchain technology' and its role in ensuring security and transparency in decentralized systems. What are the key features that make blockchain suitable for applications beyond cryptocurrencies?"