Cryptocurrency wallet

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A cryptocurrency wallet is a device,^[1] physical medium,^[2] program or an online service which stores the public and/or private keys^[3] for cryptocurrency transactions. In addition to this basic function of storing the keys, a cryptocurrency wallet more often offers the functionality of encrypting and/or signing information.^[4] Signing can for example result in executing a smart contract, a cryptocurrency transaction (see "bitcoin transaction" image), identification, or legally signing a 'document' (see "application form" image).^[5]