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(1)公钥
选择两个互异大质数p,q,使 n=pq , phi(n)=(p-1)(q-1) ,phi(n)是欧拉函数,选择一个正整数额,使其满足与phi互质,将 Kp={e,n} 称作公钥。
n=pq
phi(n)=(p-1)(q-1)
Kp={e,n}
(2)私钥
求出正数d使其满足 ed=1 mod phi ,将 Kp={d,n} 称作私钥。
ed=1 mod phi
Kp={d,n}
(3)加密变换
明文M已知,密文C,C=M^e mod n
C=M^e mod n
(4)解密变换
密文C已知,明文M,M=C^d mod n
M=C^d mod n
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