Proxies keep you secure and protect your online privacy at the same time. In fact, if you buy proxies, you can use them for visiting those websites, which are actually blocked by your Internet Service Provider.
Private proxies are used by the single user actually. For this reason, no one else can have access to your private proxies. Furthermore, these proxies are, in fact, protected using local machine’s (your computer’s) IP authorization method. Therefore, it ensures that no other computer/person can use your dedicated private proxies.