ABSTRACT
Typically, digital currencies are private monetary values that exist only in ledgers. Parallel to the soft cryptocurrencies, that is currencies that exist only in database-ledgers, also exist hard cryptocurrencies, that is, currencies that have a physical representation. The use of cryptocurrencies allows anonymity in the transaction, thus offering privacy over the performed transaction. The concept of creating a blockchain, that is the recording of a sequence of events permanently stored in a database, is applicable to many areas, including the medical field and the military. There are numerous cryptocurrencies, and new ones pop up continuously. The most visible to the public is Bitcoin. In the cryptocurrency context, the wallet is an account that is anonymously maintained by the cryptocurrency issuing organization, or by a third party. The crypto currency wallet may be a hardware device that holds the cryptocurrency account password. Such device interfaces via a USB connection, and it may hold passwords for other accesses as well.
