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  • BUUCTF-crypto:rsarsa

    1.题目:

    Math is cool! Use the RSA algorithm to decode the secret message, c, p, q, and e are parameters for the RSA algorithm.

    p = 9648423029010515676590551740010426534945737639235739800643989352039852507298491399561035009163427050370107570733633350911691280297777160200625281665378483
    q = 11874843837980297032092405848653656852760910154543380907650040190704283358909208578251063047732443992230647903887510065547947313543299303261986053486569407
    e = 65537
    c = 83208298995174604174773590298203639360540024871256126892889661345742403314929861939100492666605647316646576486526217457006376842280869728581726746401583705899941768214138742259689334840735633553053887641847651173776251820293087212885670180367406807406765923638973161375817392737747832762751690104423869019034

    Use RSA to find the secret message

    2.分析:

    本题已知p,q,e,c需求m,m是c的d次方除以n的余数,n=pq已有,c已知,d还需要求,de对(p-1)*(q-1)取余为1来算出d,因此本题写下以下脚本

    pow(a,b,c)为a的b次方再对c取余

    3.提交flag为m结果

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  • 原文地址:https://www.cnblogs.com/lidinghong/p/13970400.html
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