Covariant shielding
Covariant shielding was an extremely ful form of starship deflector shielding technology, difficult to penetrate with conventional weaponry.

The starship utilized by the interstellar fight promoter Penk to transmit Tsunkatse matches to various locations was protected by tetryon-based covariant shielding, along with reinforced hull plating and neutronic weaponry. In 2376, while attempting to rescue Lieutenant Commander Tuvok and Seven of Nine, who had been kidnapped by Penk and forced to compete, the crew of the  engaged in combat with Penk's starship, and managed to weaken the vessel's shields enough to beam their kidnapped crewmembers aboard. ()

See also
 Covariant phaser pulse
 Covariant pulse

de: Covarianter Schutzschild
Shield technology