/// <summary>
/// 3DES 加密(基于DES，对一块数据用三个不同的密钥进行三次加密，强度更高)
/// </summary>
/// <param name="encryptString">待加密密文</param>
/// <param name="encryptKey1">密钥一</param>
/// <param name="encryptKey2">密钥二</param>
/// <param name="encryptKey3">密钥三</param>
/// <returns>returns</returns>
public static string DES3Encrypt(this string encryptString, string encryptKey1, string encryptKey2, string encryptKey3)
{
return(CryptoUtility.DES3Encrypt(encryptString, encryptKey1, encryptKey2, encryptKey3));
}