What is one of the key features of IBM Blockchain?

Immutability of data is a fundamental characteristic of blockchain technology, and it is a central pillar of IBM Blockchain. This feature ensures that once a transaction is recorded on the blockchain, it cannot be altered or deleted. This creates a secure and trustworthy environment for transactions, as participants can rely on the integrity of the data. Each block in the blockchain is linked to the previous block through cryptographic hashes, which provides a tamper-evident ledger. When a new block is added, it contains a hash of the previous block, further enforcing the immutability of the entire chain.

On the other hand, while sharing data publicly may be advantageous in certain scenarios, IBM Blockchain often emphasizes permissioned systems where access is controlled, making the option of unrestricted public data sharing not representative of its key features. The concept of free access does not reflect the typical operational model of blockchain networks, especially in enterprise contexts, which often implement restrictions to protect sensitive information. Real-time data processing optimization, although beneficial, does not singularly define blockchain technology's core functionalities compared to the crucial aspect of maintaining a tamper-proof record through immutability.