Islamic extremists ISIS, block chain-based messaging app or use Islamic extremist organization ISIS is, due to what was excluded from the message app Telegram, was found to be tested using a messaging app that utilizes the block chain. The main SNS tools that terrorist organizations to use in activities such as financing, it telegram that has been encrypted. Regularly communicate the Bitcoin address, there is a use methods such as soliciting donations. However, ISIS is a month this year, by an international crackdown that EU (European Union) led, no longer able to use the telegram. The block chain, safe and anonymity is high, there is a feature that strong against tampering. Because it is also used as a key technology of virtual currency, are also suitable for acceptance of the donation, there is a possibility that you are trying to use from the point of saying. While ISIS has tried several applications, the use has been promising, the app called BCM which has a feature that can anonymity high encryption.