ITU-T K.84 PDF

It is the purpose of this Recommendation to prevent information leakage due to unintentional electromagnetic radiation from telecommunication equipment handling important information, when the telecommunication equipment or sites are managed by ISMS.

This Recommendation gives guidance to reduce the threats from information leakage due to unintentional electromagnetic emanation from information equipment at telecommunication centres.

Information is transmitted through electromagnetic waves unintentionally radiated from many kinds of equipment such as personal computers, data servers, laser printers, keyboards, and cryptographic modules. Amongst them, this Recommendation treats only information leakage from equipment including raster scan video signal. Further study is needed on issues involving other kinds of leaked signals.

Two approaches to protect against threats are given in this Recommendation.

The first approach is:

Emission requirements and methods of examining equipment are applied when the equipment cannot be installed in the shielding site, which should reduce the emission of the equipment.

The second approach is:

Shielding requirements for sites such as buildings are applied when the equipment can be installed at secure sites.