Tether (USDT) is a coin version of fiat-currencies, issued by Tether Limited Company, a kind of 'Stable Coins'. Tether allows users to send, receive and store digital tokens pegged to dollars, euros, and yen. Tether coin uses blockchain via the Omni Layer protocol, a communications protocol that uses the Bitcoin block chain. At present, USDT is pegged to the U.S. dollar and Euro. There are plans to add operations with the Japanese yen in the nearest future. The Tether cryptocurrency is secured by a Taiwan-based bank. Tether does not operate in countries that are out of cryptocurrency legislation. Namely, the platform does not operate in Bosnia, Herzegovina, Afghanistan, North Korea, Iran, Iraq, Ethiopia, Laos, Uganda, Syria, Yemen, and Vanuatu. The use of USDT is also limited Washington and New York.