Typically, they're built on other cryptographic algorithms, such as secret-key ciphers or hash functions.

Overseen by cryptographic algorithms, such a market would potentially be more transparent, more reliable, and more secure that then existing system.

Using cryptographic algorithms running across a vast network of independent machines, the blockchain can potentially oversee the exchange of any digital asset.

And the lottery ticket is a hash -a number that represents a big bunch of data and is created via cryptographic algorithms.

Using cryptographic algorithms including digital signatures, blockchain keeps track of and verifies transactions, adding new transactions in blocks to the chain of all previous transactions.