BDSMcoin and Fetishcoin are alternative currencies, or e-currencies otherwise known as cryptocurrencies. They are private currencies, but they are open source and based on the Bitcoin protocol. They can be used as an alternative to national currencies or used in other ways such as tools for discounting retail goods or human services. They were created by an individual, and do not go through banking systems. In many countries they are considered tax-exempt Ownership of either has arrived through "Proof of Work" computer mining. Like regular currencies they can be traded against other currencies.
BDSM and Fetish are decentralized and simililarly to Bitcoin feature their own publicly recorded ledger. All transactions are recorded in a block chain, although these transactions do not give names or addresses. To use them, you download an electronic wallet which generates as amny account numbers as you desire. You can then send and receive them as you wish.