Preserving information security at data centres
Governments, armed forces, municipal authorities and companies now share the concern that electrical and electronic equipment, such as computers and peripherals, give off unintended electromagnetic emanations, which can then be reconstructed beyond the building boundary as intelligible data. Countermeasures are aimed at preventing eavesdropping on data radiated as signals via conducting lines such as power, telephone or control line cables.
The TEMPEST threat to information security was first recognised by the US National Security Agency (NSA) and GCHQ in the 1960s. TEMPEST was originally a military codeword, subsequently rationalised as an acronym for terms such as “Transmitted ElectroMagnetic Pulse Emission Standard” or “Telecommunications Electronics Material Protected from Emanating Spurious Transmissions”.
Read more on this in the Mar 2023 issue of PBSI, here.
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