Adversary

An adversary is generally considered to be a person, group, or force that opposes and/or attacks.

Adversary may also refer to:


 * Satan ("adversary" in Hebrew), in Abrahamic religions

Fiction

 * Adversary (comics), villain from the Marvel comics universe
 * The mysterious antagonist who invaded the homelands in the comic book series Fables

Music

 * Ad·ver·sary, Canadian industrial musician

Law

 * Adversarial system, a system of law commonly used in common-law countries
 * Adversary proceeding, proceeding used in bankruptcy processes

Science

 * Adversarial collaboration, a scientific experiment

Computer science

 * Adversary (cryptography), a malicious entity in cryptography whose aim is to prevent the users of the cryptosystem from achieving their goal
 * Adversary model, in online algorithms, used to show competitiveness of randomized algorithms
 * Adversarial alignment, when an adversarial users constructs inputs that bypass AI alignment

Other

 * Adversarial purchasing, in business strategic management