Resumen
Preserving privacy means not only hiding the content of messages, but also hiding who is talking to whom. The simple application of cryptography within a packet-switched network hides contents of messages being sent, but can reveal who is talking to whom. Onion Routing is a general-purpose infrastructure for private communication over a public network. It provides anonymous connections that are strongly resistant to both eavesdropping and traffic analysis. These connections are bi-directional, near real-time and can be used for both connection-based and connectionless traffic. Onion Routing interfaces with off-the-shelf application software and systems through specialized proxies, making it easy to integrate into existing systems. Onion Routing operates by dynamically building anonymous connections within a network. It is a traffic analysis resistant infrastructure that is easily accessible, has low overhead, can protect a wide variety of applications and is flexible enough to adapt to various network environments and security needs.