用于帮助了解数字签名机制，相信会有人用到，希望对您有所帮助。-Digital signatures used to help understand the mechanism, I believe it was used, I hope for your help.

本程序实现了消息摘要和数字签名，涉及到的算法有md5和RSA，是一个不错的程序，希望对大家有所帮助-This procedure achieved a message digest and digital signatures are involved in the md5 algorithm and RSA, is a good program, I hope all of you to help! ! !

对输入的明文进行RSA加密，输出密文，还可以重复多次输入-On the RSA encryption plaintext input, output ciphertext, you can also repeatedly enter