Downloading a file over the internet holds risks as you can be monitored or the files may be corrupt and contain viruses. However, you can download torrents securely via the following 3 methods:
1. VPN – The use of a VPN is the most preferred and easiest way to download torrents securely as not only does it unblock torrenting sites but also provides supreme security and privacy over the internet with encryption integrated.
2. Proxy – A proxy or a proxy server is a separate entity that serves as a hub through which your internet requests are channeled. It is not safe as it does not provide you anonymity.
3. SmartDNS – This is a proxy-integrated technology that allows users to unblock geo-restricted websites such as Netflix, Hulu, Amazon Prime etc. However, it's better than proxy but not as safe as a VPN.
Check out the list of best VPN for torrenting
http://www.torrentsvpn.com/