RSA加密 解密

//加密 RSA
private string Encryption(string express)
{
CspParameters param = new CspParameters();
param.KeyContainerName = "oa_erp_dowork";//密匙容器的名称，保持加密解密一致才能解密成功
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
{
byte[] plaindata = Encoding.Default.GetBytes(express);//将要加密的字符串转换为字节数组
byte[] encryptdata = rsa.Encrypt(plaindata, false);//将加密后的字节数据转换为新的加密字节数组
return Convert.ToBase64String(encryptdata);//将加密后的字节数组转换为字符串
}
}

//解密 RSA
private string Decrypt(string ciphertext)
{
CspParameters param = new CspParameters();
param.KeyContainerName = "oa_erp_dowork";
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(param))
{
byte[] encryptdata = Convert.FromBase64String(ciphertext);
byte[] decryptdata = rsa.Decrypt(encryptdata, false);
return Encoding.Default.GetString(decryptdata);
}
}