onion routing

(redirected from Hop-by-hop)
Also found in: Acronyms.

onion routing

A method for anonymous communications over a wide area network such as the Internet. It hides the names of the parties that are communicating as well as the data by encrypting the payload in layers, with a different encryption layer for each hop in the route. Using cooperating proxy routers throughout the network, the initiating onion router, called a "Tor client" in the Tor (The Onion Router) system, determines the path and encrypts the layers using the different public keys of each router. It also encrypts the destination for the next hop in each layer. Each router decrypts the payload with its private key, unpeeling the message like an "onion" and sending the data to the next router after the next hop is decrypted and revealed. See Tor, OnionLand Search Engine, onion domain, anonymous Web surfing and anonymous remailer.


Create the Layers and "Unpeel" Them
Each router in an onion routing system "unpeels the onion," revealing the next router address and the next set of data to be encrypted.
References in periodicals archive ?
Therefore, similar to end-to-end multiplexing methods, the proposed method reduces the end-to-end delay that results from hop-by-hop multiplexing.
Another method [36] that combines the features of hop-by-hop and end-to-end multiplexing methods was proposed by Kim, Kyungtae, and Sangjin Hong.
Therefore, this method reduces the end-to-end delay that results from hop-by-hop methods and improves bandwidth utilization by performing multiplexing at each hop.