What Does Piggybacking Mean?

In the context of computer science and digital communications, “piggybacking” refers to a situation where an unauthorized party gains access to some system in connection with an authorized party. This can happen in several ways, including piggybacking on public wireless networks, and piggybacking into a password-protected system.

Techopedia Explains Piggybacking

One primary type of piggybacking deals with a user session. If an authorized user enters a password and initiates the use session, and then steps away from the workstation, an unauthorized party can get access. This is a form of piggybacking. In the physical world, it is similar to the process of one person using a transit card to get through a turnstile and another person slipping in behind them to use the same ticket.