AES-256bit

AES was approved in 2001 by the US National Institute of Science and Technology (NIST) as a replacement for the Data Encryption Standard (DES). Assuming that one could build a computer that could recover a DES key in a second (i.e., capable of trying 2⁵⁵ keys per second), then it would take that machine about 149 trillion years to crack a 128-bit AES key. Barring any attacks against AES that are faster than key exhaustion, even considering future advances in technology AES will remain secure well beyond twenty years. In other words, unless you give away the key, your data encrypted with AES256 bit is secure.

RSA

RSA is an Internet encryption and authentication system based on an asymmetric algorithm developed in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman. The RSA algorithm is the basis for public key cryptography and is included as part of the Web browsers from both Microsoft and Netscape.

Proxy

A Proxy is a server that acts as an intermediary between an application and the Internet so that the local provider can enforce security, administrative control, and caching service. A proxy server is typically associated with or is part of a gateway server that separates the local network from the outside network and of a firewall server that protects the local network from outside intrusion.

When the proxy server receives a request for an Internet service, such as a Web page download request, it uses one of its own IP addresses to request the page from the Web server out on the Internet. When the page is returned, the proxy server relates it to the original request and forwards it on to the user.