MD5 Random Hash Encryption algorithm

In the project, the password should be encrypted when the user name and password are authenticated, so the security aspect must be considered because it is a more commercialized software. The use of MD5 random hash encryption algorithm makes the password is not reversible after encryption, to a large extent, improve security. Nonsense not much to say, see example.

MD5 Encryption Class

[CSharp]View Plaincopy

2. <span style="FONT-SIZE:18PX;"  >using System;
4. Using System.Text;
6. Using System.Security.Cryptography;
10. Namespace Encrypttype
12. {
14. public class Encrypt
16. {
18. public String Encrypt (string strpwd)
20. {
22. String str = "";
26. //Initialize the MD5 object
28. MD5 MD5 = new MD5CryptoServiceProvider ();
30. //Encode character as a byte array
32. byte[] data = Encoding.Default.GetBytes (STRPWD);
34. //Computes the hash value of the data byte array
36. byte[] Md5data = md5.computehash (data);
38. //Empty MD5
40. MD5. Clear ();
42. //Traversal md5data hash Array
44. For (int i = 0; i < md5data.length-1; i++)
46. {
48. str + = Md5data[i]. ToString ("x").  PadLeft (2, ' 0 ');
50. }
54. return str;
56. }
58. }
60. }
62. </span>

Form code

[CSharp]View Plaincopy

2. <span style="FONT-SIZE:18PX;" >//Defining variables
4. String userName = "yh101";
6. String PassWord = "1234";
8. String userName = TxtUserName.Text.Trim ();
10. String PassWord = TxtPwd.Text.Trim ();
12. String str1 = "";
14. String str2 = "";
18. Instantiating cryptographic classes
20. Encrypt Encrypt = new Encrypt ();
22. Encrypt password
24. String strpwd = Encrypt.encrypt (PassWord);
28. Verify User Name
30. if (userName! = TxtUserName.Text.Trim ())
32. {
34. MessageBox.Show ("user name does not exist, please re-enter!")  ");
36. Txtusername.clear ();
38. Txtusername.focus ();
40. return;
42. }
46. Encrypt the password you entered
48. String Strmima = Encrypt.encrypt (TxtPwd.Text.Trim ());
50. Verify Password
52. if (Strmima! = strpwd)
54. {
56. MessageBox.Show ("password is incorrect, login failed!  ");
58. Txtpwd.clear ();
60. Txtpwd.focus ();
62. return;
64. }
68. MessageBox.Show ("Password is correct, login successful! "+ " Enter password: "+ Strmima + " Original password: "+ strpwd);</span>

Source: http://blog.csdn.net/happylee6688/article/details/8504067 of the Purple Feather Wind Blog

MD5 Random Hash Encryption algorithm