Stealth
Stealth was a form of camouflage technology or ability to render anything from planets, space stations, starships, and personnel to small equipment and devices invisible, or at least undetectable to sensors.

Stealth technology

Many spacefaring civilizations used varying forms of stealth technology. Perhaps the epitome of stealth was the cloaking device, which used selective bending of light and emission dampening to render a ship totally invisible and undetectable. This was used by many organizations, including the Romulan Star Empire, the Klingon Defense Force, the Hierarchy, the Sky Spirits, the Aldeans, the Minosians, the Ba'Neth, the Sphere-Builders, and the . However, the power consumption of cloaking technology were high, meaning weapons, shields, and transporters could not always be used while a cloak was on, at least in the early stages of the technology. (; ; ; ; ; ; ; ) 

The holy grail of cloaking technology was a phasing cloak, which allowed a starship to pass through solid matter and made it impervious to conventional weapons. () Other technology could be used to achieve the same effect, such as subspace force fields with adjusted synchronic distortion, interphase generators, or other interphase devices. These systems could be used to alter the phase variance of matter and energy to disappear from the perceptual range. (; )

More primitive versions of stealth were known to be used by many other races, such as the stealth technologies used by the Xyrillians, the Hirogen Stalking mode, and the Kazon-Nistrim called masking circuitry. ((); ; ) The people of Cheron had an unusual yet advanced form of stealth technology. Their ships were perfectly detectable by sensors, but sheathed in special materials that made them completely invisible. () Where as Baran's mercenary ship was sheathed with energy absorbing material that made it virtually undetectable to long range sensors, while the ship itself remained visually detectable. () Starfleet advanced long-range torpedoes were designed to be undetectable and untraceable after they were launched. ()

Deflector shields could be used to produce stealth. They could be modulated to produce an interferometric dispersion to scatter RADAR signals () and hide from more advanced sensors with refractive and multi-adaptive shielding. () Subspace could be used as a place of concealment. The Dominion used anti-personnel mines that hid in subspace and appeared at random to normal space. () The "Think Tank" could also be absorbed into subspace to hide from detection. () 

Stealth technology might also include the use of holographic equipment and was not limited to space travel. In 2154, the Romulans deployed two drone ships that used holographic technology in the form of a multispectral emitter system to disguise themselves as other vessels. () The Federation used holographic technology to hide facilities called duck blinds from pre-warp civilizations () and isolation suits to hide the personnel on these assignments. () Vosk, leader of the Na'kuhl, developed a form of stealth time travel that enabled him to escape ' forces in the 29th century to an alternate 1944 Earth. () There were were also several methods of stealth transporting, in which it was possible to beam though deflector shields and extremely difficult for others to determine the origin and destination of the transports. These included the inverter used by the Ansata terrorists on Rutia IV, the subspace transporter used by Bok, and the ancient Iconian gateway system. ()

Biological stealth

Some species even possessed a biological ability for invisibility, such as the  and the Jem'Hadar who had the ability to "shroud" themselves in a camouflage that acted as a personal cloaking field. This effectively hid them and their weapons from the naked eye and in the case of the Jem'Hadar from sensors as well. () Xaheans had a similar ability. ()

The Devidians could shift their own phase variance () and the parasitic interphasic organisms from Thanatos VII lived in a natural state of interphase. While they could attach to their victims, they themselv]es couldn't be seen or touched. () Other species had a chameleon-like ability to appear invisible such as the species native to Tarchannen III who produced a mimetic radiant effect in their skin and some of the genetically enhanced Suliban who possessed a similar ability from subcutaneous pigment sacs and the bio-mimetic garments they wore. (; ) 

Several shapeshifting species could use their abilities as a form of stealth. The Changelings had the ability to use their morphogenic enzymes to appear as fire, fog, inanimate objects, flowers, trees, and harmless small animals to avoid detection. () Members of the shapeshifting Dakalan wraith species had a similar ability to hide from their hunters by becoming an inanimate object such as a rock. Sensors would also identify them as being composed of rock when they assumed that shape. () The Daledian allasomorphs had the ability to alter their molecular structure to become smaller animals to avoid detection. () 

Members of Fantome's species had the natural ability to refract their life signs, making them undetectable to sensors. () A substance was added to the cellular structure of Angosian soldiers, who fought in the Tarsian War, to shield electrical impulses, making the soldiers undetectable to sensors. () Similarly, members of Species 8472 generated a type of bioelectric field that rendered them impervious to sensors and made transporter locks on them difficult. ()

List of stealth technologies
Bio-mimetic garment
Cloaking device
Cloaking barrier
Nullifier core
Tetryon compositor
Interphase
Interphase generator
Molecular phase inverter
Isolation suit
Masking circuitry
Multi-adaptive shielding
Shield modulator
Phasing cloak
Refractive shield
Stealth technology (25th century, etc.)

See also 
 Stealth plane
 Stealth ship

External link 
 

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Military technology
Energy technology