Conic analog of RSA cryptosystem and someimproved RSA cryptosystems

The author presents a conic analog of RSA cryptosystem and some improvedRSA cryptosysterns. Discussion shows that the conic analog of RSA cryptosystem is secure if public key exponent is low, and the security of conic analog of Rabincryptosystem is equivalent to the factorization of large integer N. So these two kindsof cryptosystem can all be applied to some designs of information security system.