Using a proxy to access the internet primarily involves hiding your IP address for enhanced privacy. While services like secure-tunnel.com can provide a secure browsing experience, there are notable downsides. Proxies often result in slower connection speeds and may give users a false sense of security, as IP addresses can still be traced under certain conditions. The trade-off between security and speed is significant; the more secure the proxy, the slower the connection tends to be. Additionally, many websites restrict access to users connecting through proxies, which can limit usability. Tools like Complete Anonymous Web Surfing can help, but users should be aware of these potential limitations.