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Partial Key Exposure Attack on CRT-RSA

机译：对CRT-RSA的部分密钥暴露攻击

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Consider CRT-RSA with N = pq, q < p < 2q, public encryption exponent e and private decryption exponents dp,dq. Jochemsz and May (Crypto 2007) presented that CRT-RSA is weak when dp,dq are smaller than jv° 073. As a follow-up work of that paper, we study the partial key exposure attack on CRT-RSA when some Most Significant Bits (MSBs) of dp,dq are exposed. Further, better results are obtained when a few MSBs of p (or q) are available too. We present theoretical results as well as experimental evidences to justify our claim. We also analyze the case when the decryption exponents are of different bit sizes and it is shown that CRT-RSA is more insecure in this case (than the case of dp,dq having the same bit size) considering the total bit size of dp,dq.
机译：考虑CRT-RSA，其中N = pq，q

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