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Although blockchain is considered secure, it is not immune to attacks. "A motivated group of hackers could leverage blockchain’s algorithm to their advantage by taking control of more than half of the nodes on the network.
"A blockchain database must be cryptographically secure." This involves the use of public and private keys to access and add data to the blockchain.
The calm before the storm.
Non-fungible tokens (NFTs) are unique assets minted on blockchains like Ethereum or Solana, representing ownership of digital or physical items, with "NFTs are built on top of blockchains, their unique identities and ownership can be verified through the ledger.