The Lightning Network is a scaling protocol for use in blockchains, the white paper of which was published in the summer of 2015. The Lightning Network has a technological dependence on the blockchain. The network offers users a secure transaction environment. Two major advantages besides security are high execution speeds and rates. The blockchain assumes an important control function here; transactions are ultimately possible even outside the actual blockchain. The basis for immediate payment execution between participants is the functionality of so-called smart contracts.