4XJS™

4Secure’s TrustedFilter™ XJS software is an XML schema and JSON inspection tool designed to easily integrate with data diodes. When installed it maintains the clients’ use of XML schema and JSON inspection between the hardware-enforced one-way link.

XML is generally used to format data in a standardised and readable way. This means that XML can be used for conformity checking, in that if a particular piece of data conforms to the data owners’ expectations (their SCHEMA) it is allowed to perform certain functions.

Many users have already adopted XML to manage and monitor data and adopt its use to support their release authority and data loss prevention systems. Once the data conforms to the owners’ expectations, it can be used as intended. If it doesn’t conform, it can’t be used, but the risk will be highlighted and the data quarantined for further analysis.

The security of data diode unidirectional technology is routed in hardware (the best way) and therefore this one-way state cannot change. This security device provides protection and segregation between the two (or more) networks.

The security of networks against malformed communications at the media or host layers of the network stack is enforced with a data diode. Still, some organisations also need a way to control the data shared between them beyond unidirectional flow control:

4Secure’s TrustedFilter™ XJS software is 4Secure’s syntactic and semantic verification engine, enabling XML schema, JSON schema and complex compound schema verification of data at the network boundary.

Using TrustedFilter™ XJS software as an additional inspection capability, alongside the flow control and protocol break (provided by a data diode), enables an enhanced cross-domain solution. This solution can prevent data loss, provide release authority to data flows out of the secure network, or provide assurance and conformity checks to the data entering the protected network.