A des symmetric encryption algorithm using one of the dotnet cryptography systems to secure data

Security | encryption | data | Algorithm (Billion International-008) [Original] Use dotnet cryptography system to ensure data security

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Author:stardicky//
E-mail:stardicky@hotmail.com//
qqnumber:9531511//
Companyname:ezone International//
class:hbs-0308//
Title: Using dotnet cipher system to ensure data security//
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Note: The DES symmetric encryption algorithm using one of the dotnet cipher Systems guarantees data security//
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Using System;
Using System.IO;
Using System.Text;
Using System.Security.Cryptography;

Namespace Ezoneinternationalsecuritycryptography
{
Class Ezonesecuritycryptographydemo
{

[STAThread]
public static void Main (string[] args)
{
Encrypt data (from memory to file)
Ezoneencryptordemo ();
Decrypting data (from file to memory)
Ezonedecryptordemo ();
}

<summary>
Encryption
</summary>
public static void Ezoneencryptordemo ()
{
Creates a file object in which the file's schema is to create a new file, and the file's access rights are writable!
FileStream fs=new FileStream ("EzoneDemo.txt", filemode.create,fileaccess.write);
Console.WriteLine ("Please enter the string you want to encrypt:");
Enter the string you want to encrypt
String Yourinput=console.readline ();
Converts a string to bytes
Byte[] Yourinputstorage=system.text.encoding.utf8.getbytes (yourinput);
Create an encryption class for the DES algorithm
DESCryptoServiceProvider myserviceprovider=new DESCryptoServiceProvider ();
Create a Cryptographic transformation interface object from the CreateEncryptor method of the encryption class object of the DES algorithm
The first parameter means: The secret key of the symmetric algorithm (64 bits in length, 8 bytes)
Can be manually input, but also can be randomly generated method is: Myserviceprovider.generatekey ();
The second parameter means the initialization vector of the symmetric algorithm (64 bits in length, that is, 8 bytes)
Can be manually input, but also can be randomly generated method is: Myserviceprovider.generateiv ();
ICryptoTransform Mytransform=myserviceprovider.createencryptor (New byte[]{100,110,120,130,100,110,120,130},new byte[]{100,110,120,130,100,110,120,130});
The purpose of the CryptoStream object is to linger the data into the stream of the encrypted transformation
CryptoStream mycryptostream=new CryptoStream (fs,mytransform,cryptostreammode.write);
Writes data from a byte array to the encrypted stream
Mycryptostream.write (yourinputstorage,0,yourinputstorage.length);
Turn off the encrypted stream object
Mycryptostream.close ();

}

<summary>
Decrypt
</summary>
public static void Ezonedecryptordemo ()
{
FileStream fs=new FileStream ("EzoneDemo.txt", FileMode.Open,FileAccess.Read);
DESCryptoServiceProvider myserviceprovider=new DESCryptoServiceProvider ();
From the CreateEncryptor method of the encryption class object of DES algorithm, create a decryption Transformation interface object
[Secret key of symmetric algorithm] must be [secret key of Symmetric algorithm] at time of encryption
[Initialization vectors for symmetric algorithms] must be [initialization vectors of symmetric algorithms] at the time of encryption
If it is not the same, an exception is thrown.
ICryptoTransform Mytransform=myserviceprovider.createdecryptor (New byte[]{100,110,120,130,100,110,120,130},new byte[]{100,110,120,130,100,110,120,130});
CryptoStream mycryptostream=new CryptoStream (fs,mytransform,cryptostreammode.read);
Byte[] Yourinputstorage=new byte[1000];
int Len=mycryptostream.read (yourinputstorage,0,yourinputstorage.length);
Console.WriteLine ("The string you have just entered is:");
Console.WriteLine (System.Text.Encoding.UTF8.GetString (Yourinputstorage,0,len));
}

}
}