C language implementation of the RSA algorithm 1. Generated keys (1) Select two safe primes p and large q. (2) calculate n = pq, φ (n) = (p-1) (q-1), where φ (n) is the Euler function value of n. (3) Select an integer e, meet a <e<φ(n)，且gcd(φ(n),e)=1。 (4)计算d，满足de≡1 modφ(n)，即d是e在模φ(n)下的乘法逆元，因e与φ(n)互素，由模运算可知，它的乘法逆元一定存在。 (5)以{e,n}为公开钥，{d,n}为秘密钥。 2.加密 加密时首先将明文M比特串分组，使得每个分组对应的十进制数小于n，即分组的长度小于log(2)n。然后对每组明文分组，作加密运算：C=M^e(mod n) 3.解密 对密文分组的解密运算为：M=C^d(mod n)

456.txt

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