1、学 号: 541307110121 指导教师: 吉星、程立辉 2016 年 4 月 12 日1目的数据加密技术是网络中最基本的安全技术,主要是通过对网络中传输的信息进行数据加密来保障其安全性,这是一种主动安全防御策略,用很小的代价即可为信息提供相当大的安全保护。2实验内容系统基本功能描述如下:1、实现DES算法加密与解密功能。2、实现TripleDES算法加密与解密功能。3、实现MD5算法加密功能。4、实现RC2算法加密与解密功能。5、实现TripleDES算法加密与解密功能。6、实现RSA算法加密与解密功能。3实验步骤3.1 Form窗体六个菜单栏:MD5加密,DES加密解密,Triple
2、DES加密解密,RC2加密解密,AES加密解密,RSA加密解密,分别对应相应的算法。代码:using System.Text;using System.Windows.Forms;using System.IO;using System.Security.Cryptography;namespace _21_Li public partial class 数据加密解密 : Form public 数据加密解密() InitializeComponent(); private void dES加密ToolStripMenuItem_Click(object sender, EventArgs e
3、) DES des = new DES(); des.MdiParent = this; des.Show(); private void rSA加密解密ToolStripMenuItem_Click(object sender, EventArgs e) RSA rsa = new RSA(); rsa.MdiParent = this; rsa.Show(); private void mD5加密ToolStripMenuItem_Click(object sender, EventArgs e) MD5 md5 = new MD5(); md5.MdiParent = this; md5
4、.Show(); private void tripleDES加密解密ToolStripMenuItem_Click(object sender, EventArgs e) TripleDES tripdes = new TripleDES(); tripdes.MdiParent = this; tripdes.Show(); private void rC2加密解密ToolStripMenuItem_Click(object sender, EventArgs e) RC2 rc2 = new RC2(); rc2.MdiParent = this; rc2.Show(); private
5、 void aES加密解密ToolStripMenuItem_Click(object sender, EventArgs e) AES aes = new AES(); aes.MdiParent = this; aes.Show();3.2 AES窗体控件:四个Lable,四个Textbox,两个Button关键代码:private void button1_Click(object sender, EventArgs e) try textBox3.Text = Security.AESEncrypt(textBox1.Text, textBox2.Text); catch (Excep
6、tion ex) MessageBox.Show(ex.Message); private void button2_Click(object sender, EventArgs e) textBox4.Text = Security.AESDecrypt(textBox3.Text, textBox2.Text);3.3 DES窗体private void button1_Click(object sender, EventArgs e)/加密 keyDES = textBox2.Text; encryptedData = textBox1.Text;/明文 textBox3.Text =
7、Security.DESEncrypt(encryptedData, keyDES); MessageBox.Show(ex.Message); private void button2_Click(object sender, EventArgs e)/解密 decryptedData = textBox3.Text; textBox4.Text = Security.DESDecrypt(decryptedData, keyDES); catch(Exception ex)3.4 MD5窗体两个Lable,两个Textbox,一个Buttonstring encryptedData;/明文
8、, string decryptedData;/密文 private void button1_Click(object sender, EventArgs e) decryptedData = Security.MD5Encrypt(encryptedData); textBox2.Text = decryptedData; catch (Exception ex) MessageBox.Show(ex.Message);3.5 RC2窗体 textBox3.Text = Security.RC2Encrypt(textBox1.Text, textBox2.Text); textBox4.
9、Text = Security.RC2Decrypt(textBox3.Text, textBox2.Text);3.6 RSA窗体四个Lable,四个Textbox,三个ButtonRSACryptoServiceProvider rsa; byte Data; byte encryptedData; byte decryptedData; private void button1_Click_1(object sender, EventArgs e) /产生RSA密钥 rsa = new RSACryptoServiceProvider(); textBox4.Text = rsa.ToX
10、mlString(false); private void button2_Click_1(object sender, EventArgs e) /RSA加密 Data = Encoding.UTF8.GetBytes(textBox1.Text); encryptedData = rsa.Encrypt(Data, false); textBox2.Text = Encoding.UTF8.GetString(encryptedData); private void button3_Click_1(object sender, EventArgs e) /RSA解密 decryptedDa
11、ta = rsa.Decrypt(encryptedData, false); textBox3.Text = Encoding.UTF8.GetString(decryptedData);3.7 Triple DES窗体四个Lable,六个Textbox,两个Buttonstring m_strEncrypt, m_strDecrypt; private void button1_Click(object sender, EventArgs e)/加密 m_strEncrypt = Security.DESEncrypt(textBox1.Text, textBox2.Text); m_st
12、rEncrypt = Security.DESEncrypt(m_strEncrypt, textBox3.Text); textBox5.Text = Security.DESEncrypt(m_strEncrypt, textBox4.Text); m_strDecrypt = Security.DESDecrypt(textBox5.Text, textBox4.Text); m_strDecrypt = Security.DESDecrypt(m_strDecrypt, textBox3.Text); m_strDecrypt = Security.DESDecrypt(m_strDecrypt, textBox2.Text); textBox6.Text = m_strDecrypt;4实验结果4.1 MD5加密、及其异常措施加密时没有输入被加密信息,抛出异常提示:4.2 DES加密解密、及其异常措施加密时没有输入密钥,抛出异常提示:输入密钥长度不符合要求,抛出异常提示:4.3 TripleDES加密解密、及其异常措施4.4 RC2加密解密、及其异常措施4.5 AES加密解密、及其异常措施4.6 RSA加密解密、及其异常措施没有生成RSA密钥,直接来加密,抛出异常提示:
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