Implementasi Algoritma Hill Cipher 3x3 dan Rabin Public Key pada Pengiriman Short Message Service (SMS)

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LAMPIRAN A : LISTING PROGRAM

1. splash.java

import android.app.Activity; import android.os.Bundle; import android.content.Intent;

import android.content.pm.ActivityInfo; import android.view.Window;

public class Splash extends Activity { protected int splash_ = 1000; @Override

protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

this.requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_splash);

//getSupportActionBar().hide();

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); setSplash();

}

public void setSplash() { new Thread() {

public void run() { try {

Thread.sleep(2000); } catch (Exception e) {

}

Intent i = new Intent(Splash.this, MainActivity.class); Splash.this.finish();

startActivity(i); }

}.start(); }

}

2. BuatPesan.java

import android.app.Activity;

import android.content.ContentValues; import android.content.Intent;

import android.database.Cursor; import android.net.Uri;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.provider.ContactsContract.CommonDataKinds.Phone; import android.telephony.SmsManager;

import android.text.TextUtils; import android.util.Log; import android.view.View;

import android.view.View.OnClickListener; import android.widget.Button;

import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import java.util.Random;

public class BuatPesan extends Activity {

EditText nomorKontak, text, hasilencrypt, kunci_p_enk, kunci_q_enk, kuncihill_enk, hasilencryptkunci;

TextView pubkey, nilaiK; // contact picker

private static final int CONTACT_PICKER_RESULT = 1001;

private long waktumulaihill, waktuakhirhill, selisihhill, waktumulairabin;

// phonecontact

public void doLaunchContactPicker(View view) {

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Intent contactPickerIntent = new Intent(Intent.ACTION_PICK, uri); startActivityForResult(contactPickerIntent, CONTACT_PICKER_RESULT); }

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

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long temp = binary % 10;

decimal += temp * Math.pow(2, power); binary = binary / 10;

power++; }

}

return decimal; }

public boolean fermat(int p) { boolean hasil = true; Random rand = new Random(); int a = rand.nextInt(20) + 1; if (a % p == 0) {

hasil = false;

} else if (modExp(a, p - 1, p) != 1) { hasil = false;

}

return hasil; }

public static int modExp(int a, int b, int n) { if (b == 0) return 1;

long t = modExp(a, b / 2, n); long c = (t * t) % n;

if (b % 2 == 1) c = (c * a) % n; return (int) c; }

@Override

public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState);

this.setTitle("Encrypt Message");

setContentView(R.layout.buatpesan);

final Button send = (Button) findViewById(R.id.send); final Button encrypt = (Button) findViewById(R.id.encrypt);

final Button encryptkunci = (Button) findViewById(R.id.encryptkunci); text = (EditText) findViewById(R.id.smsBox);

nomorKontak = (EditText) findViewById(R.id.nomorHp); hasilencrypt = (EditText) findViewById(R.id.hasilEncrypt);

hasilencryptkunci = (EditText) findViewById(R.id.hasilEncryptkunci); kunci_p_enk = (EditText) findViewById(R.id.kunci_p_enk);

kunci_q_enk = (EditText) findViewById(R.id.kunci_q_enk); kuncihill_enk = (EditText) findViewById(R.id.KunciHill_enk); pubkey = (TextView) findViewById(R.id.pubkey);

nilaiK = (TextView) findViewById(R.id.Kvalues);

Intent i = getIntent();

if (i.getStringExtra("message") != null) { text.setText(i.getStringExtra("message")); }

encryptkunci.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) { // TODO Auto-generated method stub

waktumulairabin = System.currentTimeMillis(); String enkunciaes = "";

String keyx = kuncihill_enk.getText().toString(); String p = kunci_p_enk.getText().toString(); String q = kunci_q_enk.getText().toString(); try {

if (TextUtils.isEmpty(keyx)) {

kuncihill_enk.setError("Your key is Empty"); } else if (TextUtils.isEmpty(p)) {

kunci_p_enk.setError("Private Keys cannot Empty"); } else if (TextUtils.isEmpty(q)) {

kunci_q_enk.setError("Private Keys cannot Empty"); } else if (!p.matches("[0-9]*")) {

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} else if (!q.matches("[0-9]*")) {

kunci_q_enk.setError("Private Keys must be a Number"); } else if (p.equals(q)) {

kunci_p_enk.setError("Private Keys must be Different"); } else if (!fermat(Integer.parseInt(p))) {

kunci_p_enk.setError("Private Key must be a Prime Number");

} else if (!fermat(Integer.parseInt(q))) {

kunci_q_enk.setError("Private Key must be a Prime Number");

} else if (Integer.parseInt(p) % 4 != 3) {

kunci_p_enk.setError("Private Keys must have modulus 3 when devide by 4");

} else if (Integer.parseInt(q) % 4 != 3) {

kunci_q_enk.setError("Private Keys must have modulus 3 when devide by 4");

} else {

long startTime = System.currentTimeMillis(); int uvw = Integer.parseInt(p);

int xyz = Integer.parseInt(q); long publickey = uvw * xyz;

pubkey.setText("public key :" + publickey); //tabelEnc obj1 = new tabelEnc();

for (int i = 0; i < keyx.length(); ++i) {

//Toast.makeText(getApplicationContext(), "ke: "+i+"ms", Toast.LENGTH_LONG).show();

char b = keyx.charAt(i);

int plain = tabelEnc.getIndex(b); String double_text = toBinary(plain) + toBinary(plain);

long double_dectext = Long.parseLong(double_text); long m = toDecimal(double_dectext);

long k = (m - (m % publickey)) / publickey; nilaiK.setText(nilaiK.getText() + " " + k); SimpanKunci.setKkey(String.valueOf(k)); long c = (long) (Math.pow(m, 2) % publickey); SimpanKunci.setCipherkey(String.valueOf(c));

hasilencryptkunci.setText(hasilencryptkunci.getText() + " " + c);

}

// obj2 = new simpanVariabel();

long endTime = System.currentTimeMillis(); long duration = (endTime - startTime);

Toast.makeText(getApplicationContext(), "Encryption Time: " + duration + "ms", Toast.LENGTH_LONG).show();

}

} catch (Exception e1) {

Toast.makeText(BuatPesan.this, enkunciaes, Toast.LENGTH_LONG).show();

e1.printStackTrace(); }

//hasilencryptkunci.setText(enkunciaes); }

});

encrypt.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View e) {

String ambilKata = text.getText().toString();

String kunci_enk_hill = kuncihill_enk.getText().toString(); String enKata = "";

try {

if ((kuncihill_enk.getText().toString().equals("") || text.getText().toString().equals(""))) {

Toast.makeText(BuatPesan.this, "Pesan ataupun kunci tidak boleh kosong",

Toast.LENGTH_SHORT).show(); } else {

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waktumulaihill = System.currentTimeMillis(); hillCipher obj = new hillCipher();

double sq = Math.sqrt(kunci_enk_hill.length());

System.out.println("ini double " + sq + " ini long " + (long) sq + " ini int " + (int) sq);

if (sq != (long) sq)

System.out.println("panjang kunci salah"); //0+3TLeT*9[I.MV5hk1z%z mOTR$QB>U

else {

int s = (int) sq;

if (obj.check(kunci_enk_hill, s)) { System.out.println("Result:");

obj.divide(ambilKata, s); //pakai kunci ASCII dari 32-126

System.out.println("ini ya guys :" + obj.hasilenkripsi);

Log.i("Kata Asal", ambilKata); enKata = obj.hasilenkripsi; Log.i("Kata Hasil", enKata); obj.cofact(obj.keymatrix, s);

System.out.print("inversi key " + obj.invkey); }

}

hasilencrypt.setText(enKata);

waktuakhirhill = System.currentTimeMillis(); selisihhill = waktuakhirhill - waktumulaihill;

Toast.makeText(BuatPesan.this, "lama enkripsi Hill Cipher " + Long.toString(selisihhill), Toast.LENGTH_SHORT).show();

}

} catch (Exception e1) { e1.printStackTrace(); }

} });

send.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

String pesan = hasilencrypt.getText().toString(); String nomor = nomorKontak.getText().toString(); if (pesan.length() > 0 && nomor.length() > 0) { try {

// proses kirim sms

SmsManager sms = SmsManager.getDefault();

sms.sendTextMessage(nomor, null, pesan, null, null);

// proses simpan sms yang terkirim

ContentValues values = new ContentValues(); values.put("address", nomor);

values.put("body", pesan); getContentResolver().insert(

Uri.parse("content://sms/sent"), values);

Toast.makeText(BuatPesan.this,

"Pesan berhasil dikirim", Toast.LENGTH_SHORT) .show();

finish();

} catch (Exception e) {

Toast.makeText(BuatPesan.this, "Pesan gagal dikirim", Toast.LENGTH_SHORT).show();

e.printStackTrace(); }

} else {

Toast.makeText(BuatPesan.this,

"Nomor atau Isi Pesan Masing Kosong", Toast.LENGTH_SHORT).show();

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3. LihatPesan.java

import android.app.Activity;

import android.content.DialogInterface; import android.content.Intent;

import android.net.Uri; import android.os.Bundle; import android.util.Log; import android.view.View;

import android.view.View.OnClickListener; import android.widget.Button;

import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import java.nio.charset.Charset; import java.util.Random;

public class LihatPesan extends Activity {

private static final Charset UTF8_CHARSET = Charset.forName("UTF-8"); final int tipe_enkripsi=128;

private long

selisihhill,waktuawalhill,waktuakhirhill,selisihrabin,waktuawalrabin,waktuakhirrab in,selisihtotal;

TextView number, date, msg,hasilDekripsi;

Button forward, hapus,dekripsi,dekripsikunci,btndekriphill;

EditText kunci_p_dek,kunci_q_dek,nilai_k,kuncihill_Dek,hasildekkuncihill; public boolean pil_rad=true;

@Override

setContentView(R.layout.lihatpesan); this.setTitle("Decrypt Message");

number = (TextView) findViewById(R.id.tvNumber); date = (TextView) findViewById(R.id.tvDate); msg = (TextView) findViewById(R.id.tvMsg);

hasilDekripsi = (TextView) findViewById(R.id.hasildekrip); dekripsi = (Button) findViewById(R.id.dekripsiBtn); forward = (Button) findViewById(R.id.btFrd);

btndekriphill=(Button) findViewById(R.id.btnDekripkunci); hapus = (Button) findViewById(R.id.hapus);

kunci_p_dek = (EditText) findViewById(R.id.kunci_p_dek); kunci_q_dek = (EditText) findViewById(R.id.kunci_q_dek);

hasildekkuncihill=(EditText) findViewById(R.id.hasildekkuncihill); kuncihill_Dek = (EditText) findViewById(R.id.kuncihill_dek); nilai_k = (EditText)findViewById(R.id.k_values);

kuncihill_Dek.setText(SimpanKunci.getCipherkey()); nilai_k.setText(SimpanKunci.getKkey());

btndekriphill.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) { // TODO Auto-generated method stub int a_inv = 0;

int flag = 0;

waktuawalrabin=System.currentTimeMillis();

String ambilkata2 = kuncihill_Dek.getText().toString(); String kunci_dek = kunci_p_dek.getText().toString(); String temp="";

String hasil2 = null; try {

String keyx = SimpanKunci.getCipherkey(); String p = kunci_p_dek.getText().toString(); String q = kunci_q_dek.getText().toString(); String k = SimpanKunci.getKkey();

if ("".equals(keyx)) {

kuncihill_Dek.setError("Your Cipherkey is Empty"); } else if ("".equals(p)) {

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long Sfinal = Long.parseLong(SS);

dekripsi.setOnClickListener(new OnClickListener() {

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} }

double sqt = Math.sqrt(keyaes_dek.length()); System.out.println("ini double "+sq+" ini long "+(long)sq+" ini int "+(int)sq);

if (sqt != (long) sqt)

System.out.println("panjang kunci salah"); //0+3TLeT*9[I.MV5hk1z%z mOTR$QB>U

else {

int s = (int) sqt;

if (obj1.check(keyaes_dek, s)) {

System.out.println("Result:");

obj1.divide(ambilKata, s); //pakai kunci ASCII dari 32-126

System.out.println("ini ya wee :"+obj1.hasilenkripsi);

deKata=obj1.hasilenkripsi; obj1.cofact(obj1.keymatrix, s);

System.out.print("inversi key "+obj1.invkey); }

}

waktuakhirhill=System.currentTimeMillis(); hasilDekripsi.setText(deKata);

selisihhill=(waktuakhirhill-waktuawalhill); selisihtotal=selisihhill+selisihrabin;

Toast.makeText(LihatPesan.this, "waktu dekrips Hill Cipher "+Long.toString(selisihtotal),Toast.LENGTH_SHORT).show();

} else{

Toast.makeText(LihatPesan.this, "PlainText Kunci Hill masih kosong",Toast.LENGTH_SHORT).show();

}

} catch (Exception e) {

Log.i("Error", e.getMessage());hasilDekripsi.setText("kunci tidak memenuhi GCD atau tidak memenuhi syarat inversi modulo ");}

} }); }

@Override

protected void onStart() { super.onStart(); Intent i = getIntent();

number.setText(i.getStringExtra("no")); date.setText(i.getStringExtra("date")); msg.setText(i.getStringExtra("msg"));

forward.setOnClickListener(new OnClickListener() {

@Override

Intent click = new Intent(LihatPesan.this, BuatPesan.class); click.putExtra("message", msg.getText());

startActivity(click);

} });

hapus.setOnClickListener(new OnClickListener() { @Override

Dialogs.showConfirmation(LihatPesan.this, R.string.hapuspesan_dialog,

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

Intent i = getIntent(); String id_pesan_hapus = i

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String id_thread_hapus = i

.getStringExtra("idthread");

// hapus pesan

Uri deleteUri = Uri.parse("content://sms");

getContentResolver() .delete(deleteUri,

"thread_id=? and _id=?", new String[] {

String.valueOf(id_thread_hapus),

String.valueOf(id_pesan_hapus) });

finish();

Toast.makeText(LihatPesan.this,

"Pesan Terhapus", Toast.LENGTH_SHORT) .show();

// redirect data pesan onBackPressed(); }

}); }

});

}

public String toBinary(long n) { if (n == 0) {

return "0"; }

String binary = ""; while (n > 0) { long rem = n % 2; binary = rem + binary; n = n / 2;

}

return binary; }

public long toDecimal(long binary){ long decimal = 0;

long power = 0; while(true){

if(binary == 0){ break; } else {

long temp = binary%10;

decimal += temp*Math.pow(2, power); binary = binary/10;

power++; }

}

return decimal; }

public static int[] gcd(int p, int q) { if (q==0)

return new int[] { p, 1, 0 }; int[] vals = gcd(q, p % q); int d = vals[0];

int a = vals[2];

int b = vals[1] - (p / q) * vals[2]; return new int[] { d, a, b }; }

public static int modExp(int a, int b, int n) { if (b == 0) return 1;

long t = modExp(a, b/2, n); long c = (t*t)%n;

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return (int)c; }

public boolean check(String x){ boolean hsl = true;

int a = Math.round(x.length()/2); for(int i=0; i<a; ++i)

if (x.charAt(i)!=x.charAt(i+a)) hsl=false;

return hsl; }

public boolean fermat(int p){ boolean hasil=true;

Random rand = new Random(); int a=rand.nextInt(20)+1; if (a%p==0){

hasil=false; }

else if (modExp(a,p-1,p)!=1){ hasil=false;

}

return hasil; }

public String singlebin(String x){ String n="";

for(int y=0; y<Math.floor(x.length()/2); y++){ n= n+x.charAt(y);

}

return n; }

@Override

public void onBackPressed() {

Intent link = new Intent(LihatPesan.this, DataPesan.class); Intent i = getIntent();

link.putExtra("tipepesan", i.getStringExtra("asal")); startActivity(link);

}}

4. MainActivity.java

import android.os.Bundle; import android.view.View;

import android.view.View.OnClickListener; import android.view.Window;

import android.widget.Button; import android.app.Activity; import android.content.Intent;

public class MainActivity extends Activity { //Button tentang, bantuan;

@Override

this.requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main);

((Button) findViewById(R.id.btnPesanbaru)).setOnClickListener(new OnClickListener() {

MainActivity.this.startActivity(new Intent( MainActivity.this, BuatPesan.class)); }

});

((Button) findViewById(R.id.btnPesankeluar)).setOnClickListener(new OnClickListener() {

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startActivity(click); }

});

((Button) findViewById(R.id.btnPesanmasuk)).setOnClickListener(new OnClickListener() {

Intent click = new Intent(MainActivity.this, DataPesan.class);

click.putExtra("tipepesan", "inbox"); startActivity(click);

} });

((Button) findViewById(R.id.btnBantuan)).setOnClickListener(new OnClickListener() {

@Override

Intent i = new Intent(MainActivity.this, bantuan.class); startActivity(i);

} });

((Button) findViewById(R.id.btnTentang)).setOnClickListener(new OnClickListener() {

@Override

Intent i = new Intent(MainActivity.this, tentang.class); startActivity(i);

} });

((Button) findViewById(R.id.btnKeluar)).setOnClickListener(new OnClickListener() {

Intent intent = new Intent(Intent.ACTION_MAIN); intent.addCategory(Intent.CATEGORY_HOME);

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent);

System.exit(0); }

}); } }

5. DataPesan.java

import java.util.Date; import java.text.DateFormat; import android.app.Activity;

import android.content.ContentResolver; import android.content.Intent;

import android.database.Cursor; import android.net.Uri;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.support.v4.widget.SimpleCursorAdapter; import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView;

import android.widget.TextView; import android.view.View;

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private SimpleCursorAdapter dataAdapter;

@Override

public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

setContentView(R.layout.listpesan); this.setTitle("List Message"); displayListView();

}

private void displayListView() { Intent i = getIntent(); Uri uriSMS = Uri

.parse("content://sms/" + i.getStringExtra("tipepesan"));

Cursor cursor = getContentResolver().query(uriSMS, null, null, null,

null);

String[] columns = new String[] { "address", "body", "date" };

int[] to = new int[] { R.id.pengirim, R.id.isipesan, R.id.waktu };

dataAdapter = new SimpleCursorAdapter(this, R.layout.pesan_row, cursor,

columns, to, 0);

ListView listView = (ListView) findViewById(R.id.listView1);

dataAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {

@Override

public boolean setViewValue(View view, Cursor cursor, int columnIndex) {

// ubah nomer hape dengan nama yang ada dikontak

if (columnIndex == 2) {

TextView tv = (TextView) view; String pengirimDB =

cursor.getString(cursor

.getColumnIndex("address"));

// get contact name

Uri contactUri = Uri.withAppendedPath(

ContactsContract.PhoneLookup.CONTENT_FILTER_URI,

Uri.encode(pengirimDB)); Cursor cur =

getContentResolver().query(contactUri, null,

null, null, null); ContentResolver contect_resolver = getContentResolver();

int size = cur.getCount(); if (size > 0 && cur != null) {

for (int i = 0; i < size; i++) { cur.moveToPosition(i);

String id1 = cur.getString(cur

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Cursor phoneCur = contect_resolver

.query(contactUri,

null,

ContactsContract.CommonDataKinds.Phone.CONTACT_ID

+ " = ?",

new String[] { id1 }, null);

if (phoneCur.moveToFirst()) {

String namaKontak = phoneCur.getString(phoneCur

.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAM E));

phoneCur.close();

tv.setText(namaKontak);

} else {

tv.setText(pengirimDB);

}

cur.close(); } else {

tv.setText(pengirimDB); }

return true; }

// konversi tanggal if (columnIndex == 4) {

TextView tv = (TextView) view;

String waktu = cursor.getString(cursor .getColumnIndex("date")); long l = Long.parseLong(waktu);

Date d = new Date(l); String date =

DateFormat.getDateInstance(DateFormat.LONG)

.format(d); String time =

DateFormat.getTimeInstance().format(d);

String view_waktu = date + " " + time;

tv.setText(view_waktu);

return true; }

return false; }

});

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// jika di pesan di klik, maka akan dialihkan ke lihat pesan secara full

listView.setOnItemClickListener(new OnItemClickListener() { @Override

public void onItemClick(AdapterView<?> listView, View view,

int position, long id) { // Get the cursor, positioned to the corresponding row in the

// result set

Cursor cursor = (Cursor) listView.getItemAtPosition(position);

// Get the state's capital from this row in the database.

String view_pengirim = cursor.getString(cursor

.getColumnIndexOrThrow("address"));

String view_isipesan = cursor.getString(cursor .getColumnIndexOrThrow("body"));

String waktu = cursor.getString(cursor

.getColumnIndexOrThrow("date"));

// konversi tanggal

long l = Long.parseLong(waktu); Date d = new Date(l);

String date = DateFormat.getDateInstance(DateFormat.LONG)

.format(d); String time =

DateFormat.getTimeInstance().format(d);

String view_waktu = date + " " + time;

String view_idpesan = cursor.getString(cursor .getColumnIndexOrThrow("_id")); String view_thread = cursor.getString(cursor

.getColumnIndexOrThrow("thread_id"));

Intent click = new Intent(DataPesan.this, LihatPesan.class);

// get contact name

Uri contactUri = Uri.withAppendedPath(

ContactsContract.PhoneLookup.CONTENT_FILTER_URI,

Uri.encode(view_pengirim)); Cursor cur =

getContentResolver().query(contactUri, null, null, null, null);

ContentResolver contect_resolver = getContentResolver();

int size = cur.getCount(); if (size > 0 && cur != null) {

for (int i = 0; i < size; i++) { cur.moveToPosition(i);

String id1 = cur.getString(cur

.getColumnIndexOrThrow(ContactsContract.Contacts._ID));

Cursor phoneCur = contect_resolver

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null,

ContactsContract.CommonDataKinds.Phone.CONTACT_ID

+ " = ?", new String[] { id1 },

null);

if (phoneCur.moveToFirst()) { String namaKontak = phoneCur.getString(phoneCur

.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAM E));

phoneCur.close(); click.putExtra("no", namaKontak);

} else {

click.putExtra("no", view_pengirim);

}

cur.close(); } else {

click.putExtra("no", view_pengirim); }

// kirim data ke view pesan

click.putExtra("msg", view_isipesan); click.putExtra("idpesan", view_idpesan); click.putExtra("idthread", view_thread); click.putExtra("date", view_waktu); Intent i = getIntent();

click.putExtra("asal", i.getStringExtra("tipepesan"));

startActivity(click); }

}); }

@Override

public void onBackPressed() {

Intent link = new Intent(DataPesan.this, MainActivity.class);

startActivity(link); finish();

} }

6. hillCipher.java

public class hillCipher { int keymatrix[][]; int linematrix[]; int resultmatrix[]; String hasilenkripsi = ""; String invkey = "";

public String divide(String temp, int s) { while (temp.length() > s) {

String sub = temp.substring(0, s); temp = temp.substring(s, temp.length()); perform(sub);

}

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else if (temp.length() < s) {

for (int i = temp.length(); i < s; i++) temp = temp + ' ';

perform(temp); }

return hasilenkripsi; }

//E>Ybm=PNu

public void perform(String line) { linetomatrix(line);

linemultiplykey(line.length()); result(line.length());

}

public void keytomatrix(String key, int len) { keymatrix = new int[len][len];

int c = 0;

for (int i = 0; i < len; i++) { for (int j = 0; j < len; j++) {

keymatrix[i][j] = (tabelEnc.getIndex(key.charAt((3*i)+j))); System.out.print(keymatrix[i][j] + " ");

c++; }

System.out.println(); }

}

public void linetomatrix(String line) { linematrix = new int[line.length()]; for (int i = 0; i < line.length(); i++) {

linematrix[i] = (tabelEnc.getIndex(line.charAt(i))); }

}

public void linemultiplykey(int len) { resultmatrix = new int[len]; for (int i = 0; i < len; i++) { for (int j = 0; j < len; j++) {

resultmatrix[i] += keymatrix[i][j] * linematrix[j]; }

resultmatrix[i] %= 97; }

}

public void result(int len) { //System.out.print("len "+len); String result = "";

for (int i = 0; i < len; i++) {

hasilenkripsi += tabelEnc.getChar(resultmatrix[i]); }

}

public boolean check(String key, int len) { keytomatrix(key, len);

int d = determinant(keymatrix, len); int mod = 97;

while (d < 0) { d = d + 97; mod = mod + 97; }

d = d % 97;

if (d == 0) {//YH)&F(lZ;

System.out.println("Invalid key!!! Key is not invertible because determinant=0...");

return false; }

else {

return true; }

}

(18)

(19)

{

inv[i][j] = b[i][j] % 97; if (inv[i][j] < 0) inv[i][j] += 97; inv[i][j] *= mi; inv[i][j] %= 97; }

}

matrixtoinvkey(inv, r); }

public int mi(int d) {

int q, r1, r2, r, t1, t2, t; r1 = 97;

r2 = d; t1 = 0; t2 = 1;

while (r1 != 1 && r2 != 0) {

q = r1 / r2; r = r1 % r2; t = t1 - (t2 * q); r1 = r2;//"ay&k1F N r2 = r;

t1 = t2; t2 = t; }

return (t1 + t2); }

public void matrixtoinvkey(int inv[][], int n) {

for (int i = 0; i < n; i++) {

for (int j = 0; j < n; j++) {

invkey += (tabelEnc.getChar(inv[i][j])); }

} }}

7. tabelEnc.java

/**

* Created by Fitri on 16/04/2016. */

public class tabelEnc { static char tabel[] =

{'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T',' U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o' ,'p','q','r','s','t','u','v','w','x','y','z','0','1','2','3','4','5','6','7','8',' 9',' ','.',',','@','#','$','%','&','-','+','(',')','*','"','\'',':',';',

'!','?','_','/','~','|','^','=','{','}','\\','[',']','<','>','®','€','©'};

public static int getIndex(char x) { for (int i=0;i<97;i++) {

if (x == (tabel[i])){ return i;

} }

return -1; }

public static char getChar(int x) { return tabel[x];

(20)

8. SimpanKunci.java

public class SimpanKunci {

private static String cipherkey="", Kkey = ""; public static void setCipherkey(String c){ cipherkey += c + " ";

}

public static String getCipherkey(){

return cipherkey; }

public static void setKkey(String c){

Kkey += c + " "; }

public static String getKkey(){

return Kkey; }

public static void Reset(){ cipherkey = "";

Kkey = ""; }

}

9. Dialog.java

import android.app.AlertDialog; import android.content.Context;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

public class Dialogs {

public static void showConfirmation(Context context, int message, OnClickListener onYes) {

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder( context);

// set title

alertDialogBuilder.setTitle(R.string.confirmation);

// set dialog message alertDialogBuilder

.setMessage(message) .setCancelable(false)

.setPositiveButton("Ya", onYes) .setNegativeButton("Tidak",

new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int id) {

dialog.cancel(); }

});

// create alert dialog

AlertDialog alertDialog = alertDialogBuilder.create();

// show it

alertDialog.show(); }

(21)

10. bantuan.java

import android.app.Activity; import android.os.Bundle;

public class bantuan extends Activity { @Override

setContentView(R.layout.bantuan); this.setTitle("Help");

} }

11. tentang.java

import android.app.Activity; import android.os.Bundle;

public class tentang extends Activity { @Override

setContentView(R.layout.tentang); this.setTitle("About");

(22)

D

AFTAR

R

IWAYAT

H

IDUP

C

URRICULUM

V

ITAE

I. D

ATA

P

RIBADI

/

Personal Identification

Nama Lengkap

: Fitri Rahmadhani

Tempat/Tgl. Lahir : Medan / 28 Februari 1995

Jenis Kelamin

: Perempuan

Agama

: Islam

Kebangsaan

: Indonesia

Alamat

: Jalan AR Hakim Gg.Nangka No.42 A Medan Area,

Medan, Sumatera Utara, Indonesia 20216

Telepon

: +6285277328530

Moto Hidup

: Bermanfaat bagi Orang Lain

Email

: [email protected]

II. K

EMAMPUAN

/ Capabilities

Bahasa

: Bahasa Indonesia, Bahasa Inggris

Bahasa Pemrograman

: C#, PHP,

Java for Mobile

Database

: MySQL

Lainnya

: HTML, CSS, Photoshop, Ms. Office, Adobe Flash

III. P

ENDIDIKAN

F

ORMAL

/ Formal Education



[ 2012

–

2016 ]

S1 Ilmu Komputer, Fakultas Ilmu Komputer dan Teknologi Informasi

Universitas Sumatera Utara



[ 2009

–

2012 ]

SMA Swasta Eria Medan



[ 2006

–

2009 ]

SMP Swasta Al Washliyah Medan



[ 2000

–

2006 ]

SD Swasta Nurhasanah Medan

IV. P

ENDIDIKAN

N

ON

-

FORMAL

/ Informal Education



[ 2001

–

2006 ]

Ta’limul Qur’an Lil Aulad (TQA) Al

- Fauzi, Medan



[ 2011

–

2012 ]

Ganesha Operation, Medan.

V. P

RESTASI

/ Achievements

1)

Delegasi dari Indonesia di Young ICT Leaders Forum, Busan, Korea Selatan [2015]

2)

Pengajar Muda Gerakan USU Mengajar [2014]

3)

Finalis Desain ARTechno Universitas Sumatera Utara [2014]

4)

Juara 2 Desain Poster “

Islamic Booming

” Aladiyansyah Expo Universitas Sumatera Utara

[2014]

5)

Juara 2 Desain Poster “

Keep Health Tooth

” Mukernas FKG Nasional [2014]

6)

Juara 3 Fotografi “

Healhty Smile

” Mukernas FKG Nasional [2014]

7)

Honorable Participant Of SGC English Universitas Sumatera Utara [2014]

8)

Juara 3 Menulis Puisi untuk Ibu Universitas Sumatera Utara [2013]

(23)

VI. P

ENGALAMAN

K

ERJA

/ Working Experience

1)

Desainer Grafis di Mitra Jaya Solusindo, Medan [2016]

2)

Asisten Laboratorium di Ilmu Komputer

Laboratory Center (IKLC) Fasilkom-TI USU,

Medan [2013-2016]

3)

Volunteer Desain di WWF Indonesia [2016]

VII. P

ENGALAMAN

B

ERBICARA

/ Speaking Experience

1)

Pemateri Animasi di Al-Khuwarizmi Academy Al-Khuwarizmi USU, Universitas Sumatera

Utara [2015]

2)

Pemateri Animasi di IMILKOM Goes to School, Universitas Sumatera Utara [2015]

3)

Instruktur di Training Islam Ceria dan Kreatif (TRICK), UKMI Al-Khuwarizmi Fasilkom-TI

Universitas Sumatera Utara [2014]

VIII. P

ELATIHAN DAN

S

EMINAR

/ Trainings & Workshop

1)

Peserta Pelatihan

“

Builiding Strong Indonesia Digitalpreneur with Distruptive Mindset

” by

Indigo in DiLo, Medan [2016]

2)

Peserta Seminar Bukalapak [2015]

3)

Peserta Pelatihan Design Top Coder Universitas Sumatera Utara [2015]

4)

Peserta Seminar dan

Workshop

Windows Phone Microsoft

Indonesia [2014]

5)

Peserta Seminar Nasional Literasi Informasi (SENARAI) Fasilkom-TI Universitas Sumatera

Utara [2014]

6)

Peserta Training Junior Multimedia dan Fundamental Graphical from KOMINFO [2014]

7)

Peserta Workshop Desain Grafis [2013]

8)

Peserta Seminar Kongres Nasional ILP2MI (Ikatan Lembaga Penalaran dan Penelitian

Mahasiswa Indonesia) Universitas Sumatera Utara [2013]

9)

Peserta Training Islam Ceria dan Kreatif, UKMI Al-Khuwarizmi, Medan [2013]

10)

Peserta Pelatihan Dasar Organisasi IMILKOM USU [2013]

11)

Peserta Pelatihan dan Kesekretariatan IMILKOM USU [2013]

12)

Peserta Seminar

Smartfren Library

“Kulik Lebih Jauh lagi Teknologi Rev B” Universitas

Sumatera Utara [2012]

13)

Peserta Seminar One Day Building Line Follower Robot Universitas Sumatera Utara [2012]

14)

Peserta Training Ramadhan UKMI AlKhuwarizmi Universitas Sumatera Utara [2012]

15)

Peserta Training dan Workshop Linux KSL (Kelompok Studi Linux) Universitas Sumatera

Utara [2012]

16)

Peserta Seminar

“Perempuan dan Ruang Publik” Universitas Sumatera Utara dan Universitas

Paramadina [2012]

17)

Peserta Pesantren Kilat Ramadhan, SMA Swasta Eria Medan [2010;2011]

XI. P

ENGALAMAN

O

RGANISASI

/ Organizational Experiences

1)

Sekretaris Relawan TIK (Indonesian ICT Volunteers) Komisariat USU [2013

–

Sekarang]

2)

Manager Digital Marketing Communication AIESEC [2015

–

2016]

3)

Sekretaris Jenderal Pemerintahan Mahasiswa (PEMA) Fasilkom-TI Universitas Sumatera

Utara [2015

–

2016]

4)

Bendahara Smart Generation Community (SGC) Universitas Sumatera Utara [2014

–

2015]

5)

Sekretaris Komisi Pemilihan Umum (KPU) Universitas Sumatera Utara [2014-2015]

6)

Sekretaris Bidang Syiar UKMI Al-Khuwarizmi Universitas Sumatera Utara [2014-2015]

7)

Divisi Blogger Sahabat Beasiswa Untuk Negeri [2013-2014]

8)

Bendahara Kelompok Studi Linux (KSL) Universitas Sumatera Utara [2012

–

2013]

(24)

X. P

ENGALAMAN

K

EPANITIAAN

/ Committee Experiences

1)

Anggota Publikasi dan Dokumentasi di Penyambutan Mahasiswa Baru Ilmu Komputer

Universitas Sumatera Utara [2014]

2)

Sekretaris di Science Competition se-Sumatera Utara [2014]

3)

Anggota Publikasi dan Dokumentasi Pekan Olahraga dan Seni (PORSENI) IMILKOM USU

[2014]

4)

Bendahara di Pesta Akbar Mentoring Universitas Sumatera Utara [2014]

5)

Wakil Sekretaris ARTechno Universitas Sumatera Utara [2014]

6)

Sekretaris Training Islam Ceria dan Kreatif (TRICK) IX UKMI Al Khuwarizmi Universitas

Sumatera Utara [2013]

7)

Tim Kreatif di Dakwah Expo 6 Universitas Sumatera Utara [2013]

8)

Panitia Pelaksana pada Pelatihan Sistem Informasi Geografis di S1 Ilmu Komputer USU

[2013]

9)

Anggota Acara di Kuliah Umum Indonesia-Jepang Universitas Sumatera Utara [2013]

10)

Tim Kreatif di Al Khuwarizmi Festival Universitas Sumatera Utara [2013]

11)

Anggota Konsumsi di Dies Natalis S1 Ilmu Komputer ke-11 Universitas Sumatera Utara

[2012]

XI. P

ENGABDIAN

/

Social Volunteer

1)

Pengabdian SLB Yayasan Pembinaan Anak Cacat (YPAC) Relawan TIK Sumatera Utara

[2016]

2)

Pengabdian Masyarakat SMATerpadu Al-Bukhari Muslim Medan [2016]

3)

Pengabdian Masyarakat SMP Negeri 1 Binjai Sumatera Utara [2016]

4)

Gerakan 1001 Al Quran UKMI Ad Dakwah Universitas Sumatera Utara [2015]

5)

Bakti Sosial Panti Asuhan Bani Adam UKMI Al Khuwarizmi Universitas Sumatera Utara

[2014]

6)

Pengabdian Masyarakat SMA Pakam dan Tanjung Morawa Sumatera Utara [2014]

7)

Bakti Sosial Gunung Sinabung Relawan TIK Sumut [2014]

8)

Pengabdian Masyarakat TK Uswatun Hasanah Medan Relawan TIK Sumatera Utara [2013]

XI. P

ROJEK YANG TELAH DIKERJAKAN

/ Portofolio Project

1)

Website

“Sewa Kost”

Projek Pemrograman Internet

2)

IKLC Portal Projek Pemrograman Visual dengan C#

3)

Animasi Company Profile UKMI Al Khuwarizmi Projek Pengajaran Berbantuan Komputer

4)

Aplikasi

Chef’s

Key Projek Mobile Programming

5)