ˈædvɚsɚɹi kɹɪptˈɑːɡɹəfi, ɐ mɐlˈɪʃəs ˈɛntᵻɾi ɪn kɹɪptˈɑːɡɹəfi hˌuːz ˈeɪm ɪz tə pɹɪvˈɛnt ðə jˈuːzɚz ʌvðə kɹˈɪptəsˌɪstəm fɹʌm ɐtʃˈiːvɪŋ ðɛɹ ɡˈoʊl
Adversary (cryptography), a malicious entity in cryptography whose aim is to prevent the users of the cryptosystem from achieving their goal