Asymmetric Key Cryptography 

A means to secure communication. Cryptocurrencies have two keys: public(everyone can see) and private (secret and only for the owner). The two keys are connected mathematically in that the private key is used to derive the public key: With current technology, it is not feasible to derive the private key from the public key (hence, the description “asymmetric”). Users can receive a payment to their public address and spend it with their private key. Also see symmetric key cryptography.