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extranet ['ekstrǝnet] n
econ.	δίκτυο extranet
English thesaurus
extranet ['ekstrǝnet] n
comp., MS	Extranet (An extension of an organization's intranet used to facilitate communication with the organization's trusted partners. An extranet allows such trusted partners to gain limited access to the organization's internal business data)
IT	A private network that resides on the Internet and allows a company to securely share business information with customers, suppliers or other businesses as well as to execute electronic transactions (Different from an Intranet in that it is located beyond the company's firewall. Therefore, an extranet relies on the use of securely issued digital certificates (or alternative methods of user authentication) and encryption of messages. A virtual private network (VPN) and tunneling are often used to implement extranets, to ensure security and privacy)