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Differential fault analysis
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<p>Differential fault analysis (DFA) is a type of active <a href="/facts/Side-channel_attack/2B1dfBty">side-channel attack</a> in the field of <a href="/facts/Cryptography/e94PEVau">cryptography</a>, specifically <a href="/facts/Cryptanalysis/7CPEQlJI">cryptanalysis</a>. The principle is to induce <i>faults</i>—unexpected environmental conditions—into cryptographic operations to reveal their internal states. </p>