Binary Information Press
A novel salting method is proposed to resist side-channel attack in RSA cryptosystem. The salting method randomizes the RSA modular exponent by a random number. Salted exponent effectively disturbs the power trace in different segments which makes power analysis to discern the RSA key at very low probability with regard to the length of the random number. The limitation of this method is given, and the way of using random values also brings the security benefits.