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Adversary may refer to:

In Judeo-Christian religion:

  • Satan, whose name means "adversary" in Hebrew.

In computer science:

  • Adversary (cryptography) is a malicious entity in cryptography whose aim is to prevent the users of the cryptosystem from achieving their goal.
  • Adversary (online algorithm), the adversary model is used in online algorithms in order to show competitiveness of randomized algorithms.

In fiction:

In Dance:

In law:

See also

da:Opponent sv:Opponent tl:Katunggali

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