Information Exchange Gateway

• An IEG is a system designed to facilitate secure communication between different security and management domains.

An IEG is a solution for effecting information sharing between different security and information domains by providing a managed set of information exchange services.
https://cybermatters.info/2015/01/19/introduction-information-exchange-gateways

• An Information Exchange Gateway (IEG) is a system designed to enable the flow of information

between networks whilst at the same time protecting an internal domain from both inbound
malware threats and outbound leakage of  sensitive information.  An IEG consists of a number of
components implemented within a De-Militarised Zone (DMZ). The IEG hides the internal domain from the outside world, only exposing interfaces for the required information exchange.
Where IEGs are implemented between two networks with a mutual distrust, a pair of IEGs is required, each one protecting its own network and connected to each other via a Wide Area
Network (WAN).
https://www.deep-secure.com/wp-content/uploads/2015/08/IEG-Paper-Implementing-Deep-Secure-guards-in-NATO-IEGs.pdf

• The Guard terminates network connections and extracts the XML requests and responses from them. It verifies the content is acceptable before using a new connection to deliver the data.

https://www.deep-secure.com/wp-content/uploads/2014/06/xml-guard-brochure1.pdf

• The Deep-Secure XML Guard, a deceptively simple-looking little red box, offers businesses unparalleled security and protection from known and unknown forms of cyber attack.  The software in the new Deep-Secure XML Guard protects companies not by trying to look for viruses or removing malicious code that can be hidden within normal business data but by extracting the business data and sending it on its way in a safe and trusted format.An example of the application of a Deep-Secure XML Guard is to protect a log management system such as Assuria’s Assuria Log Manager

https://www.deep-secure.com/wp-content/uploads/2014/04/deep-secure-guard-assuria-log-manager.pdf