piggybacking

piggybacking

(1) Gaining access to a restricted communications channel by using the session another user already established. Piggybacking can be defeated by logging out before walking away from a workstation or terminal or by initiating a screensaver that requires re-authentication when resuming. See replay attack.

(2) Taking advantage of a wireless hotspot near a home or small business that does not have a secure connection. See Wi-Fi hotspot.

(3) Embedding the names of popular brands or companies into the hidden meta-data of a Web page in order to rank high up on a search engine's results page. See meta tag.

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1.		piggybacking - A method for passing acknowledgement frames and data frames in the same direction along a line.
2.		piggybacking - The practice of increasing memory capacity by soldering chips on top of other chips. The chip-enable or high address pins would be connected to the address bus by a flying lead. Many Ohio Superboards were expanded to a massive 8K of RAM in this way.