**3. Blockchain for backup and recovery**

Having shown to the reader the blockchain capabilities as a secure ledger, this section wants to analyze blockchain as a support tool to implement backup and recovery strategies. We have chosen this use case because it shows in a different way another use of blockchain, far from the common ones which usually appear in the literature.

One of the most innovative applications of blockchain technologies is to use it by secure storage and recovery systems. A Backup & recovery system usually has the following features:


Historically, backup and recovery procedures were applied mainly to generalpurpose devices in the enterprise environment. The number of incidents grows daily, and the consequences are increasingly alarming as, for example, security holes in IP cameras [6], DDOS attacks generated from the Mirai botnet [7, 8] known as Dyn Attack or event take control of a vehicle [9]. Due to these problems, Backup & Recovery systems are being extended to cover these devices too.
