This is normal since the RSA private key is in the Chinese Remainder
format ( p, q, dp, dq and d). The first four elements have half the size
of the moduluse and the last has the same size as the modulus. Thus, the
hole RSA private key encoding will take three times the modulus size
which is roughly the size of the RSA public key.

IDRIX - Cryptography And IT Security Experts

robert2007 a écrit :
> Hello,
> I am working with OpenSSL and am interested in why my private key is three
> time the size of my public key when using 1024 bit RSA?
> Thanks.

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