THRESHOLD RAS CRYPTOSYSTEMS
Wu Ting · Journal of Shandong University · 2002
Since the secret key of a RSA crytosystem d ∈Z φ(n) ,the secret sharing schemes of the previous threshold RSA cryptosystems were set up over the ring Z φ(n) .But it has two difficulties: Z φ(n) is not a field and the φ(n) must be kept secret.We propose a method to overcome these two difficulties by using a transform and also give a brief discussion on its security.