java写的可以用rsa加密解密的代码，随机产生密钥，数据格式是长整型，代码包含求逆元、大数取模模块。-Can be written in java rsa encryption and decryption code, randomly generated key, the data format is a long integer, the code contains the inverse element, large numbers modulo module.

java 实现DES文件加密、MD5获取数字签名和文件验证、rsa签名加密。分为接收端和发送端。-java implementation of the DES file encryption, MD5 obtaining digital signatures and document verification, rsa signature encryption. Into the receiver and transmitter.

一个rsa 实现的例子，java实现代码简明-a rsa demo