This is a RSA private key :

<BitStrength>4944</BitStrength>
<RSAKeyValue>
    <Modulus>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</Modulus>
    <Exponent>AQAB</Exponent>
    <P>8RUZbaB91ve478Jam2QjOWooTrvtaOzoe6hygPA8E6GlEqwryGg2180lUUoM+RdFTgmKvxaLyV7Xg4RZHD0vWYmE4VT/ChulT52qn8IPgIV1O+F67EVh4ovVCx/vXEiDCLpzWRgyMr8VazsM71xmLi8N5+3esFNcdoFk7a+7odVC5xIAK8N/BiXu+PVYeai4begJTvXtK1bFFr7TQCmC6JUp84/dFCoNIyMHjVFYuz2Td8D3quxjPRaj+fnjYtce92JD0v5rkfmYTSFt2EbZKkdMJpS7MeDmFErOUDSYVOdu7CbmlVbXcD6QbSC2RbX/fbyTWwyAti3JSJ+WzUbrnp9olXEcldMt7Z8okT2Y9apxmKNYibq0XN+JPhdBlk1EffhRiCGHfFAsNME85dvRI0naJMxD</P>
    <Q>ynJ6nUraqvWP178eFFbrY//r274r59ckV/4/TFd/vlxPjLR4XpRgM16o/rrIyjDqko5MCm4f0LYZoNfe/6/Xz1WsbfuFCcp+SdFrVFDjE4rzszys25/fum4TcsSbmsQflNY108QD0Mf+6xBsuVlWh8WWXKim0aplVF6tEiz3bMEWWjTM5Wuv65hEO9V6q+BNJ+j3VqZdVBPKKqnyxxK84zFXec8JqGqYo2qxFEahunagv0hm5sCLerv3GcBAy719q43eecwHfIEgNuAFoMLr4R/IFMLPy31CQHMalFRazfu4CZoIwDkDVZHfACHDoLR+91LbMG/UZhRnv0YZ9+fFajINxTPkgIvLwaf624yZ2DOF8h+Aor5evHZ00/iD6AP0kogjd0JlXTvVVL2R8VeGowfkHnEl</Q>
    <DP>oTHmarKg8Zd5hHaDdtsh4kXk5aAqQboGSIh851G6GbY/VZjhPYLRCMIWbaABxJuWr3MZ3mMI3IAZwcpAeu0+N7QHsVLPpMaPZgiaCXAMRXb2yC8frdNGe9/bdzDHLwEc/D0O20eeaOfzPluhbnptp/u2ZJlcCLH0ZRhnj7Ws06xwq2gRzTFOQaIjgzspCU+S4YoAj1dIWW4PIgI95ezbpv/1qPFMdSsY1aGabxcxKSEm9S+Fajfcsv/sbDx1maUVA3wktXOAIX6uIwRzGeVlVyuM808HS3aA4JiUEnTYVgzY0fXAv6HtMxPiJdV1im8CgeQQ8xQNC8LZj0GF54PAD7Oujh2va05kqzl8OoDhQYHRqqmtjYnVBzQ/49BQ/lpzrXbXrRoeKTTCGhQKz/aGg/3hajFZ</DP>
    <DQ>TOlFD/DaNkzoguyGvu9uqiUWM/uBrqiblBpxbc1oKKflSO1fNX9lNN7nkS7hDX+b/mW1GdlQmPg1sFeSzsy9TnWb9oSxvFCDvgOjpPq96jTF9Pg+K4oHc0pSdS2geCG+Zcsj0/oKAQ2aGS+6PohkSVyVjUo9ZjY4HN+DHP6cWWLZ3RdmKFrLENReR+UIn7etWFY3cWHu3vxNt/us0liaDi42r34qiyNELgFgmPVkh/R9iW42OcA4vT4f2Fajx0OMNNrHBLqwtWpRFMfzG2oyNureFpUUYJiLzPRtyqBphwv0lSFB5dVDIQU0FVa+fZVVDx0ZTMOPi+CAsbguMXKKG5g8hwj57KQvmrj4ouQ9plecsamqMynjz/Go3MbzRfgKuIikALDm1Y7fszv58BhyfAmJbs9J</DQ>
    <InverseQ>3awPjKSwbmVsn+Ip7nwwSRgJHJhHBqr/KmT7NBv9cOAFXEaz9v7VmhSLU3GZcfHi9J0gTa/2POCd5X3IT5bEtf42jDgfP39vGDqc8liWOZG2Ha7Y/TteIO9REAIy7tTPdWWG0TyBVQah4eC0A9KS9GDR1cLL0wdky38ppNwZT3V1kzgBoow1Agea44rM+tgUIZtrPxtHHBNFgX2Mkbn3CZKg1Qpe98GjIGEkZhwMM3RfYo0uW732t908gDNBaMY5S5+ixr3XZfph9wJZiq1JUwMhMPa8gGTLiRNm6rDlNimgaAv3iBnGCZhSdX11bbj5qQrM17wDqyOyk44ywt1T9SW9K6Tode57pUoxVB9XkOLHCnx6of371xx5bhZ4l9NIbdLldfj1CI4bSOMqN/r7UZ96upoJ</InverseQ>
    <D>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</D>
</RSAKeyValue>

It contains couple of elements (Modules, Exponent, P, E, DP, DQ, InverseQ, D)

I read somewhere that the main element of a RSA private key is D.

But I want to know which parts of these elements should be secret and which parts can be publicly shared ? (Means there's no security problem if it be shared)

Thanks

有帮助吗?

解决方案

From Wikipedia: The public key consists of the modulus n and the public (or encryption) exponent e. The private key consists of the modulus n and the private (or decryption) exponent d, which must be kept secret. p, q, and φ(n) must also be kept secret because they can be used to calculate d.

This means that that you are correct. D is the most important part, but because 'd' can be found from other information (p,DP,DQ, InverseQ) they too should also be kept secret. The modulus and exponent form the public key.

source: http://en.wikipedia.org/wiki/RSA_(cryptosystem)

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