//File : DesServer.java
//DesReceiver
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class DesServer
{
public static void main(String []str)throws Exception
{
ServerSocket ss = new ServerSocket(5656);
Socket s = null;
InputStream is = null;
ObjectInputStream ois = null;
Frame f =null;
while(true)
{
s=ss.accept();
is = s.getInputStream();
ois = new ObjectInputStream(is);
f = (Frame)ois.readObject();
System.out.println(decryptString(f.data,f.k,new IvParameterSpec(f.iv)));
break;
}
ois.close();
is.close();
s.close();
ss.close();
}
static String decryptString(String data,Key key,IvParameterSpec ivspec)throws Exception
{
KeyGenerator kg = KeyGenerator.getInstance("DES");
kg.init(56);
Cipher c = Cipher.getInstance("DES/CBC/PKCS5Padding");
Key k = key;
c.init(Cipher.DECRYPT_MODE,new SecretKeySpec("12345678".getBytes(),"DES"),ivspec);
byte[] plaintext = c.doFinal(data.getBytes());
return new String(plaintext);
}
}
/******************************************************************/
//File : DesClient.java
//DesClient
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class DesClient
{
static KeyGenerator kg = null;
static Cipher c = null;
static Key k = null;
static byte[] ivector=null;
public static void main(String []str)
{
String datatosend=null;
try
{
datatosend = encryptString(getDataFromFile("Data.txt"));
Frame f = new Frame(datatosend,k,ivector);
sendFrame("localhost",5656,f);
}
catch(Exception e)
{
System.out.println(e);
}
}
static String getDataFromFile(String filename) throws Exception
{
String str="";
Scanner sc = new Scanner(new File(filename));
while(sc.hasNextLine())
{
str=str + sc.nextLine();
}
sc.close();
return str;
}
static String encryptString(String data) throws Exception
{
kg = KeyGenerator.getInstance("DES");
kg.init(56);
c = Cipher.getInstance("DES/CBC/PKCS5Padding");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,new SecretKeySpec("12345678".getBytes(),"DES"));
byte[] plaintext = data.getBytes();
byte[] ciphertext = c.doFinal(plaintext);
ivector = c.getIV();
return new String(ciphertext);
}
static void sendFrame(String remoteaddress,int port,Frame f) throws Exception
{
Socket s = new Socket(remoteaddress,port);
OutputStream os = s.getOutputStream();
ObjectOutputStream ous = new ObjectOutputStream(os);
ous.writeObject(f);
ous.close();
os.close();
s.close();
}
}
/***********************************************************/
//File : Frame.java
//Frame Class
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class Frame implements Serializable
{
String data;
Key k;
byte[] iv;
Frame(String mydata,Key key,byte[] ivector)
{
data=mydata;
k = key;
if(ivector==null)
{
iv = null;
}
else
{
iv = new byte[ivector.length];
for(int i=0;i<ivector.length;i++)
{
iv[i]=ivector[i];
}
}
}
}
Wednesday, May 11, 2011
Using AES ( CBC ) Encryption in java with Client Server
Browsing gmail using secure connection
Follow the simple steps given below :
Step 1 : Click on Settings option situated at top right corner of screen.
Step 2 : In General tab look for 5th option "Browser connection".
Step 3 : Click on Always use https option.
Step 4 : Save changes
After completing procedure you will see https://www.gmail.com instead of http://www.gmail.com. This indicates that you are browsing gmail on secure connection. It makes your connection encrypted by using SSL/TLS protocols so protects you from the eavesdropping and intercepting your data by someone for malicious purpose.
You can also enable secure browsing in facebook. Read how to make facebook connection secure here
Step 1 : Click on Settings option situated at top right corner of screen.
Step 2 : In General tab look for 5th option "Browser connection".
Step 3 : Click on Always use https option.
Step 4 : Save changes
After completing procedure you will see https://www.gmail.com instead of http://www.gmail.com. This indicates that you are browsing gmail on secure connection. It makes your connection encrypted by using SSL/TLS protocols so protects you from the eavesdropping and intercepting your data by someone for malicious purpose.
You can also enable secure browsing in facebook. Read how to make facebook connection secure here
Tuesday, May 10, 2011
Using AES ( CFB ) Encryption in java with Client Server
//File : AesClient.java
//AesClient
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesClient
{
static KeyGenerator kg = null;
static Cipher c = null;
static Key k = null;
static byte[] ivector=null;
public static void main(String []str)
{
String datatosend=null;
try
{
datatosend = encryptString(getDataFromFile("Data.txt"));
Frame f = new Frame(datatosend,k,ivector);
sendFrame("localhost",5656,f);
}
catch(Exception e)
{
System.out.println(e);
}
}
static String getDataFromFile(String filename) throws Exception
{
String str="";
Scanner sc = new Scanner(new File(filename));
while(sc.hasNextLine())
{
str=str + sc.nextLine();
}
sc.close();
return str;
}
static String encryptString(String data) throws Exception
{
kg = KeyGenerator.getInstance("AES");
//kg.init(128);
c = Cipher.getInstance("AES/CFB/PKCS5Padding");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,new SecretKeySpec("1234512345123451".getBytes(),"AES"));
byte[] plaintext = data.getBytes();
byte[] ciphertext = c.doFinal(plaintext);
ivector = c.getIV();
return new String(ciphertext);
}
static void sendFrame(String remoteaddress,int port,Frame f) throws Exception
{
Socket s = new Socket(remoteaddress,port);
OutputStream os = s.getOutputStream();
ObjectOutputStream ous = new ObjectOutputStream(os);
ous.writeObject(f);
ous.close();
os.close();
s.close();
}
}
/***************************************************************************/
//File : AesServer.java
//AESReceiver
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesServer
{
public static void main(String []str)throws Exception
{
ServerSocket ss = new ServerSocket(5656);
Socket s = null;
InputStream is = null;
ObjectInputStream ois = null;
Frame f =null;
while(true)
{
s=ss.accept();
is = s.getInputStream();
ois = new ObjectInputStream(is);
f = (Frame)ois.readObject();
System.out.println(decryptString(f.data,f.k,new IvParameterSpec(f.iv)));
break;
}
ois.close();
is.close();
s.close();
ss.close();
}
static String decryptString(String data,Key key,IvParameterSpec ivspec)throws Exception
{
KeyGenerator kg = KeyGenerator.getInstance("AES");
//kg.init(128);
Cipher c = Cipher.getInstance("AES/CFB/PKCS5Padding");
Key k = key;
c.init(Cipher.DECRYPT_MODE,new SecretKeySpec("1234512345123451".getBytes(),"AES"),ivspec);
byte[] plaintext = c.doFinal(data.getBytes());
return new String(plaintext);
}
}
/*************************************************************************/
//File : Frame.java
//Frame Class
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class Frame implements Serializable
{
String data;
Key k;
byte[] iv;
Frame(String mydata,Key key,byte[] ivector)
{
data=mydata;
k = key;
if(ivector==null)
{
iv = null;
}
else
{
iv = new byte[ivector.length];
for(int i=0;i<ivector.length;i++)
{
iv[i]=ivector[i];
}
}
}
}
Browsing facebook using secure connection and Login Notification system
Follow the steps given below to browse facebook using secure connection.
Step 1 : Click on Account menu at the top right corner.
Step 2 : In that click Account Settings option.
Step 3 : On the settings tab click on Account Security option
Step 4 : Check "Browse Facebook on a secure connection (https) whenever possible" box.
Click on Save and you are done.
After completing procedure you will see https://www.facebook.com instead of http://www.facebook.com. This indicates that you are browsing facebook on secure connection. It makes your connection encrypted by using SSL/TLS protocols so protects you from the eavesdropping and intercepting your data by someone for malicious purpose.
The other option is of Login Notifications .
It will notify you when you try to log in to your facebook account using different computer/IP address.
There are two notification options.
1.Send me an Email
When you try to log in using different computer/IP address, facebook will notify you about your log in attempt by sending you an email
2.Send me a text message
When you try to log in using different computer/IP address, facebook will notify you about your log in attempt by sending you a text message on mobile no you have specified in your facebook account.
You can also enable secure browsing in Gmail. Read how to make facebook connection secure here
Step 1 : Click on Account menu at the top right corner.
Step 2 : In that click Account Settings option.
Step 3 : On the settings tab click on Account Security option
Step 4 : Check "Browse Facebook on a secure connection (https) whenever possible" box.
Click on Save and you are done.
After completing procedure you will see https://www.facebook.com instead of http://www.facebook.com. This indicates that you are browsing facebook on secure connection. It makes your connection encrypted by using SSL/TLS protocols so protects you from the eavesdropping and intercepting your data by someone for malicious purpose.
The other option is of Login Notifications .
It will notify you when you try to log in to your facebook account using different computer/IP address.
There are two notification options.
1.Send me an Email
When you try to log in using different computer/IP address, facebook will notify you about your log in attempt by sending you an email
2.Send me a text message
When you try to log in using different computer/IP address, facebook will notify you about your log in attempt by sending you a text message on mobile no you have specified in your facebook account.
You can also enable secure browsing in Gmail. Read how to make facebook connection secure here
Using AES ( ECB ) Encryption in java with Client Server
//File : AESClient.java
//AESClient
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AESClient
{
static KeyGenerator kg = null;
static Cipher c = null;
static Key k = null;
public static void main(String []str)
{
String datatosend=null;
try
{
datatosend = encryptString(getDataFromFile("Data.txt"));
Frame f = new Frame(datatosend,k);
sendFrame("localhost",5656,f);
}
catch(Exception e)
{
System.out.println(e);
}
}
static String getDataFromFile(String filename) throws Exception
{
String str="";
Scanner sc = new Scanner(new File(filename));
while(sc.hasNextLine())
{
str=str + sc.nextLine();
}
sc.close();
return str;
}
static String encryptString(String data) throws Exception
{
kg = KeyGenerator.getInstance("AES");
c = Cipher.getInstance("AES");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,k);
byte[] plaintext = data.getBytes();
byte[] ciphertext = c.doFinal(plaintext);
return new String(ciphertext);
}
static void sendFrame(String remoteaddress,int port,Frame f) throws Exception
{
Socket s = new Socket(remoteaddress,port);
OutputStream os = s.getOutputStream();
ObjectOutputStream ous = new ObjectOutputStream(os);
ous.writeObject(f);
ous.close();
os.close();
s.close();
}
}
/********************************************************************/
//File : AESServer.java
//AESServer
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AESServer
{
public static void main(String []str)throws Exception
{
ServerSocket ss = new ServerSocket(5656);
Socket s = null;
InputStream is = null;
ObjectInputStream ois = null;
Frame f =null;
while(true)
{
s=ss.accept();
is = s.getInputStream();
ois = new ObjectInputStream(is);
f = (Frame)ois.readObject();
System.out.println(decryptString(f.data,f.k));
break;
}
ois.close();
is.close();
s.close();
ss.close();
}
static String decryptString(String data,Key key)throws Exception
{
KeyGenerator kg = KeyGenerator.getInstance("AES");
Cipher c = Cipher.getInstance("AES");
Key k = key;
c.init(Cipher.DECRYPT_MODE,k);
byte[] plaintext = c.doFinal(data.getBytes());
return new String(plaintext);
}
}
/*****************************************************/
//File : Frame.java
//Frame Class
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class Frame implements Serializable
{
String data;
Key k;
Frame(String mydata,Key key)
{
data=mydata;
k = key;
}
}
Using AES ( CBC ) Encryption in java with Client Server
//File : AesClient.java
//AesClient
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesClient
{
static KeyGenerator kg = null;
static Cipher c = null;
static Key k = null;
static byte[] ivector=null;
public static void main(String []str)
{
String datatosend=null;
try
{
datatosend = encryptString(getDataFromFile("Data.txt"));
Frame f = new Frame(datatosend,k,ivector);
sendFrame("localhost",5656,f);
}
catch(Exception e)
{
System.out.println(e);
}
}
static String getDataFromFile(String filename) throws Exception
{
String str="";
Scanner sc = new Scanner(new File(filename));
while(sc.hasNextLine())
{
str=str + sc.nextLine();
}
sc.close();
return str;
}
static String encryptString(String data) throws Exception
{
kg = KeyGenerator.getInstance("AES");
kg.init(128);
c = Cipher.getInstance("AES/CBC/PKCS5Padding");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,new SecretKeySpec("1234512345123451".getBytes(),"AES"));
byte[] plaintext = data.getBytes();
byte[] ciphertext = c.doFinal(plaintext);
ivector = c.getIV();
return new String(ciphertext);
}
static void sendFrame(String remoteaddress,int port,Frame f) throws Exception
{
Socket s = new Socket(remoteaddress,port);
OutputStream os = s.getOutputStream();
ObjectOutputStream ous = new ObjectOutputStream(os);
ous.writeObject(f);
ous.close();
os.close();
s.close();
}
}
/*******************************************************************/
//File : AesServer.java
//AESReceiver
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import java.math.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesServer
{
public static void main(String []str)throws Exception
{
ServerSocket ss = new ServerSocket(5656);
Socket s = null;
InputStream is = null;
ObjectInputStream ois = null;
Frame f =null;
while(true)
{
s=ss.accept();
is = s.getInputStream();
ois = new ObjectInputStream(is);
f = (Frame)ois.readObject();
System.out.println(decryptString(f.data,f.k,new IvParameterSpec(f.iv)));
break;
}
ois.close();
is.close();
s.close();
ss.close();
}
static String decryptString(String data,Key key,IvParameterSpec ivspec)throws Exception
{
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(128);
Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
Key k = key;
c.init(Cipher.DECRYPT_MODE,new SecretKeySpec("1234512345123451".getBytes(),"AES"),ivspec);
byte[] plaintext = c.doFinal(data.getBytes());
return new String(plaintext);
}
}
/********************************************************************/
//File : Frame.java
//Frame Class
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class Frame implements Serializable
{
String data;
Key k;
byte[] iv;
Frame(String mydata,Key key,byte[] ivector)
{
data=mydata;
k = key;
if(ivector==null)
{
iv = null;
}
else
{
iv = new byte[ivector.length];
for(int i=0;i<ivector.length;i++)
{
iv[i]=ivector[i];
}
}
}
}
Using AES ( CFB8 ) Encryption in java with Client Server
//File : AesServer.java
//AESReceiver
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesServer
{
public static void main(String []str)throws Exception
{
ServerSocket ss = new ServerSocket(5656);
Socket s = null;
InputStream is = null;
ObjectInputStream ois = null;
Frame f =null;
while(true)
{
s=ss.accept();
is = s.getInputStream();
ois = new ObjectInputStream(is);
f = (Frame)ois.readObject();
System.out.println(decryptString(f.data,f.k,new IvParameterSpec(f.iv)));
break;
}
ois.close();
is.close();
s.close();
ss.close();
}
static String decryptString(String data,Key key,IvParameterSpec ivspec)throws Exception
{
KeyGenerator kg = KeyGenerator.getInstance("AES");
Cipher c = Cipher.getInstance("AES/CFB8/PKCS5Padding");
Key k = key;
c.init(Cipher.DECRYPT_MODE,k,ivspec);
byte[] plaintext = c.doFinal(data.getBytes());
return new String(plaintext);
}
}
/***************************************************************************/
//File : AesClient.java
//AESClient
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import java.net.*;
import java.util.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class AesClient
{
static KeyGenerator kg = null;
static Cipher c = null;
static Key k = null;
static byte[] ivector=null;
public static void main(String []str)
{
String datatosend=null;
try
{
datatosend = encryptString(getDataFromFile("Data.txt"));
Frame f = new Frame(datatosend,k,ivector);
sendFrame("localhost",5656,f);
}
catch(Exception e)
{
System.out.println(e);
}
}
static String getDataFromFile(String filename) throws Exception
{
String str="";
Scanner sc = new Scanner(new File(filename));
while(sc.hasNextLine())
{
str=str + sc.nextLine();
}
sc.close();
return str;
}
static String encryptString(String data) throws Exception
{
kg = KeyGenerator.getInstance("AES");
kg.init(128);
c = Cipher.getInstance("AES/CFB8/PKCS5Padding");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,k);
byte[] plaintext = data.getBytes();
byte[] ciphertext = c.doFinal(plaintext);
ivector = c.getIV();
return new String(ciphertext);
}
static void sendFrame(String remoteaddress,int port,Frame f) throws Exception
{
Socket s = new Socket(remoteaddress,port);
OutputStream os = s.getOutputStream();
ObjectOutputStream ous = new ObjectOutputStream(os);
ous.writeObject(f);
ous.close();
os.close();
s.close();
}
}
/*****************************************************************************/
//File : Frame.java
//Frame Class
//Developed by Malhar Vora
//Developed on : 9-5-2011
import java.io.*;
import javax.crypto.*;
import java.security.*;
import javax.crypto.spec.*;
public class Frame implements Serializable
{
String data;
Key k;
byte[] iv;
Frame(String mydata,Key key,byte[] ivector)
{
data=mydata;
k = key;
if(ivector==null)
{
iv = null;
}
else
{
iv = new byte[ivector.length];
for(int i=0;i<ivector.length;i++)
{
iv[i]=ivector[i];
}
}
}
}
Tuesday, May 3, 2011
Osama Dead - Censored Video Leaked Scam on facebook
Today morning i saw link on my facebook wall shared by one of my friend.The text was "Osama Dead - Censored Video Leaked" . This link was one of the very recent facebook scam. The scammers have used the reference toWikileaks to show link genuine to viewer.
By Clicking on the link had taken me to the fan page and asked me to complete 5 steps. Completing 5 steps did nothing but posted same link on my friends wall to spread itself.
The page was something like given below.
By Clicking on the link had taken me to the fan page and asked me to complete 5 steps. Completing 5 steps did nothing but posted same link on my friends wall to spread itself.
The page was something like given below.
Precautions should be taken before clicking on any link that seems suspicious to you because that link can redirect you to a page which is used to steal your using a social engineering attack.
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