The A/B, A/B/C, or A/B/C/D switch used for network switching in IP-based VTC systems implementing a single CODEC supporting conferences on multiple networks having different classification levels must be Common Criteria certified.

Common Criteria provides assurance that the process of specification, implementation, and evaluation of a computer security product has been conducted in a rigorous, standard, and repeatable manner at a level that is commensurate with the target environment for use. The DSAWG mandated that the A/B, A/B/C, or A/B/C/D switches used in VTC systems implementing a single CODEC supporting conferences on multiple networks having different classification levels, where these networks are simultaneously and permanently connected to these networks, must receive NIAP approval in accordance with CNSSP #11. This was primarily due to the potential interconnection of separate networks designated as National Security Systems through the switch. This was a prerequisite to their approval of the multinetwork VTC system architecture. Therefore, the A/B, A/B/C, or A/B/C/D switch must be satisfactorily evaluated and validated in accordance with the provisions of the NIAP Common Criteria Evaluation and Validation Scheme.