TEMPEST

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TEMPEST

An umbrella term for external electromagnetic radiation from data processing equipment and the security measures used to prevent them. Almost all electronic equipment, including chips, bus pathways and metal communications lines, emanates signals into free space or surrounding conductive objects such as metal cabinets, wires and pipes. Equipment and cables that meet TEMPEST requirements have extra shielding in order to keep data signals from escaping and being picked up by unauthorized eavesdropping. It is also possible to use TEMPEST software that generates sufficient electronic noise to mask meaningful radio-frequency emissions.

TEMPEST was a code name for U.S. military operations throughout the 1960s. The name was turned into several informal reverse acronyms such as Telecommunications Electronics Material Protected from Emanating Spurious Transmissions or Transient ElectroMagnetic Pulse Emanation STandard (see backronym). See emanation and EMSEC.
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References in classic literature ?
The atmospheric currents, under the influence of a tempest not far off, were driving them at the rate of from thirty to thirty-five miles an hour; the undulating and fertile plains of Mfuto were passing swiftly beneath them.
"But the tempest!" said the doctor, with much uneasiness.
Again, those perils avoided, the force of the tempest might hurl us to the ground, were we to cast our anchor in the tree-tops."
Below them, the tempest; above them, the starry firmament, tranquil, mute, impassible, with the moon projecting her peaceful rays over these angry clouds.
There had been no abatement in the ferocity of the tempest, nor was there indication of any.
We can only assume that she decided to fly before the morning meal and was caught in the clutches of the tempest. You will pardon me, Gahan, if I leave you abruptly--I am arranging to send ships in search of her;" but Gahan, Jed of Gathol, was already speeding in the direction of the palace gate.
The grey air shivered, a moan ran about the rocks and died away, then an icy breath burst from the lips of the tempest and rushed across the earth.
Then I turned to look; through the rush of the tempest and the reek of the rain, still I could see her sweeping forward high in air.
An overhanging rock offered him a temporary shelter, and scarcely had he availed himself of it when the tempest burst forth in all its fury.
Dantes ran down the rocks at the risk of being himself dashed to pieces; he listened, he groped about, but he heard and saw nothing -- the cries had ceased, and the tempest continued to rage.
Prospero's final boast (5.1.33-50), echoing Ovid's Medea (Metamorphoses 15.197-209), emphasizes two fearful skills: (1) raising tempests (or more generally, using the spirit-power of Art to disrupt Nature, like the "tempest" by which God speaks to Job) and (2) reanimating the dead.
The Tempest tells of the usurped Duke of Milan who, in exile, adopts the name Prospero (Postlethwaite) and perfects a magic so powerful he can summon up storms and tempests at will.