All transactions are related with the previous transaction and therefore it can not be tracked or hacked. But if any user provides a security key to anyone, it can be easily attacked. Protocols and cryptography have a strong security profile, and the Bitcoin network is probably the largest distributed inventory project in the world. Bitcoin data archiving private key may be random, lost or stolen. Fortunately, users can apply security measures to protect their money or use the services of providers offering high levels of security and insurance against theft or loss.