virtual private network
noun
plural virtual private networks
: a private computer network that functions over a public network (such as the Internet) and usually utilizes data encryption to provide secure access to something (such as an internal business server or private network)
He persuaded its users to communicate through a virtual private network, or VPN, a secure channel that sends encrypted messages between computers …—James Verini
Tony, like all savvy Internet thieves, uses a virtual private network that masks his computer's true Internet Protocol address every time he logs on.—Joe Light
called also VPN
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Merriam-Webster unabridged
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