Blockchains are secured through various mechanisms, including advanced cryptography and mathematical models of decision making and behavior. Blockchain technology is the infrastructure of most digital currency systems, which prevents digital currencies from being copied and destroyed.

Blockchain technology is also particularly important in other environments where data immutability and security are very important. Relevant cases include recording and tracking charitable donations, medical databases, and supply chain management.

However, the security of blockchains is far from a simple issue. Therefore, it is critical to understand the basic concepts and mechanisms of these innovative systems to provide strong protection for blockchains#