LAMPIRAN A: Kode Program

(1)

68 LAMPIRAN A: Kode Program

1. proses_teks_tanpa_stemming_executor.php

<?php

$teks = hapus_spesial_karakter_dan_nomor(strtolower($teks));

function hapus_spesial_karakter_dan_nomor($string){

return preg_replace('/[^A-Za-z]/', ' ', trim($string)); }

@$arrayKata = explode(" ", $teks); foreach($arrayKata as $kata){

$kata = hapus_2_karakter($kata); if(trim($kata) != "") {

@$teks_kata = $teks_kata . " " . $kata; }

}

function hapus_2_karakter($kata){ if (strlen($kata) > 2){

return $kata; } else {

return ""; }

} ?>

2. proses_teks_dengan_stemming_executor.php

<?php

function hapus_spesial_karakter_dan_nomor($string){

return preg_replace('/[^A-Za-z]/', ' ', trim($string)); }

@$arrayKata = explode(" ", $teks); foreach ($arrayKata as $kata) { $kata = hapus_2_karakter($kata); if (trim($kata) != "") {

@$teks_kata = $teks_kata . " " . $kata; }

}

function hapus_2_karakter($kata) { if (strlen($kata) > 2) {

return ""; }

}

$arrayKata = explode(" ", $teks_kata); foreach ($arrayKata as $kata) {

$a = hapus_stop_words(trim($kata)); if ($a != "") {

@$hasil_hapus_stop_words = $hasil_hapus_stop_words . " " . $a; }

}

function hapus_stop_words($kata) {

$q=mysql_query("SELECT * FROM tb_stoplist WHERE stoplist='$kata'") or die(mysql_error());

(2)

if (mysql_num_rows($q) > 0) { return "";

} else {

return $kata; }

} ?>

3. ECS.php

//Hapus Inflection Suffixes (..-lah, ..-kah, ..-mu, atau ..-nya) function Del_Inflection_Suffixes($kata) {

$kataAsal = $kata;

if(preg_match('([km]u|nya|[kl]ah|pun)', $kata)){ //Cek Inflection Suffixes

$__kata = preg_replace('/([km]u|nya|[kl]ah|pun)$/i', '', $kata); if (preg_match('/([klt]ah|pun)$/i', $kata)){

//Jika berupa partikel (..-lah, ..-kah, ..-tah, atau ..-pun) if (preg_match('/([km]u|nya)$/i', $__kata)){

//Hapus Possesive Pronouns (..-ku, ..-mu, atau ..-nya) $__kata__ = preg_replace('([km]u|nya)$', '', $__kata); return $__kata__;

} }

return $__kata; }

return $kataAsal; }

//Cek Prefix Disallowed Sufixes (Kombinasi Awalan dan Akhiran yang tidak diizinkan)

function Cek_Prefix_Disallowed_Sufixes($kata) {

if (preg_match("/^(be)[[:alpha:]]+(i)$/i", $kata)) { //be-.. dan ..-i

return true; }

if (preg_match("/^(di)[[:alpha:]]+(an)$/i", $kata)){ //di-.. dan ..-an

return true; }

if (preg_match("/^(ke)[[:alpha:]]+(i|kan)$/i", $kata)){ //ke-.. dan ..-i, ..-kan

return true; }

if (preg_match("/^(me)[[:alpha:]]+(an)$/i", $kata)){ //me-.. dan ..-an

return true; }

if (preg_match("/^(se)[[:alpha:]]+(i|kan)$/i", $kata)){ //se-.. dan ..-i, ..-kan

return true; }

return false; }

//Hapus Derivation Suffixes (..-i, ..-an, atau ..-kan) function Del_Derivation_Suffixes($kata) {

$kataAsal = $kata;

if (preg_match('/(kan)$/', $kata)){ //Cek Suffixes

(3)

70

return $__kata; }

}

if (preg_match('/(an|i)$/', $kata)){ //cek ..-kan

$__kata__ = preg_replace('/(an|i)$/', '', $kata); if (cekKamus($__kata__)) { //Cek Kamus

return $__kata__; }

}

if (Cek_Prefix_Disallowed_Sufixes($kata)) { return $kataAsal;

}

return $kataAsal; }

//Hapus Derivation Prefix (di-.., ke-.., se-.., te-.., be-.., me-.., atau pe-..)

function Del_Derivation_Prefix($kata) { $kataAsal = $kata;

/* --- Tentukan Tipe Awalan --- */

if (preg_match('/^(di|[ks]e)\S{1,}/', $kata)) { //Jika di-.., ke-.., se-..

$__kata = preg_replace('/^(di|[ks]e)/', '', $kata); if (cekKamus($__kata)) {

return $__kata; //Jika ada maka balik }

$__kata__ = Del_Derivation_Suffixes($__kata); if (cekKamus($__kata__)) {

return $__kata__; }

}

if (preg_match('/^([tmbp]e)\S{1,}/', $kata)){ //Jika awalannya adala te-.., me-.., be-.., atau pe-.. /* --- Awalan be-.. --- */

if (preg_match('/^(be)\S{1,}/', $kata)){ //Jika awalan be-..

if(preg_match('/^(ber)[aiueo]\S{1,}/', $kata)) { //Aturan 1 $__kata = preg_replace('/^(ber)/', '', $kata);

if (cekKamus($__kata)) {

return $__kata__; }

$__kata = preg_replace('/^(ber)/', 'r', $kata); if (cekKamus($__kata)) {

return $__kata__; }

}

/* --- Awalan te-.. --- */

if (preg_match('/^(ter)[aiueo]\S{1,}/', $kata)) { //Aturan 6 $__kata = preg_replace('/^(ter)/', '', $kata);

if (cekKamus($__kata)) {

(4)

return $__kata__; }

$__kata = preg_replace('/^(ter)/', 'r', $kata); if (cekKamus($__kata)) {

return $__kata__; }

}

/* --- Awalan me-.. --- */

if (preg_match('/^(me)\S{1,}/', $kata)) { //Jika awalan me-.. if (preg_match('/^(me)[lrwyv][aiueo]/', $kata)) { //Aturan 10 $__kata = preg_replace('/^(me)/', '', $kata); if (cekKamus($__kata)) {

@$__kata__ = Del_Derivation_Suffixes($__kata__); if (cekKamus($__kata__)) {

return $__kata__; }

} }

/* --- Awalan memper-.. --- */

if (preg_match('/^(memper)\S{1,}/', $kata)) {

$__kata = preg_replace('/^(memper)/', '', $kata); if (cekKamus($__kata)) {

return $__kata__; }

/* --- Cek luluh -r.. --- */

$__kata = preg_replace('/^(memper)/', '', $kata); if (cekKamus($__kata)) {

return $__kata__; }

}

/* --- Cek luluh -r.. --- */

$__kata = preg_replace('/^(mempel)/', 'l', $kata); if (cekKamus($__kata)) {

return $__kata__; }

}

/* --- Cek Ada Tidaknya Prefix/Awalan di-.., ke-.., se-.., te-.., be-te-.., me-te-.., atau pe-.. --- */

(5)

72

return $kataAsal; }

function Enhanced_CS($kata) { $kataAsal = $kata;

//1. Cek Kata di kamus, jika ada maka selesai if (cekKamus($kata)) {

//2. Buang Infection Suffixes (..-lah, ..-kah, ..-ku, ..-mu, atau ..-nya)

$kata = Del_Inflection_Suffixes($kata);

//3. Buang Derivation Suffix (..-i atau ..-an) $kata = Del_Derivation_Suffixes($kata);

//4. Buang Derivation Prefix

$kata = Del_Derivation_Prefix($kata); return $kata;

} } ?>

4. winnowing.php

<?php

function winnow($teks, $nilai_gram, $window) {

$teks = hapus_special_karakter_dan_nomor($teks); $grams = pembentukan_grams($teks, $nilai_gram); $hash = pembentukan_hash($grams);

$array_window = membuat_window($hash, $window); $finger = finger_print($array_window);

$finger = array_unique($finger); return $finger;

}

function similarity($finger1, $finger2) { $finger_sama = 0;

foreach ($finger1 as $h1) { foreach ($finger2 as $h2) { if ($h1 == $h2) {

$finger_sama++; break;

} } }

$finger_merge = array_merge($finger1, $finger2); $finger_unik = array_unique($finger_merge); $total_finger_unik = sizeof($finger_unik);

$jaccard_coefficient = $finger_sama / $total_finger_unik; return $jaccard_coefficient;

}

function buat_hash($teks, $gram) {

$grams = pembentukan_grams($teks, $gram); $hash = pembentukan_hash($grams);

return $hash; }

function hapus_special_karakter_dan_nomor($teks) {

return preg_replace('/[^A-Za-z]/', '', trim(strtolower($teks))); }

(6)

$jum = strlen($string); $temp = 0;

$kgram_temp = 0;

$batas = $kgramAwal - 1;

for ($i = 0; $i < $jum - $batas; $i++) { $res[] = substr($string, $i, $kgramAwal); $temp = $kgram;

$kgram = $kgram + 1; }

return $res; }

function pembentukan_hash($grams) { $arrayHash = array();

foreach ($grams as $pos => $gram) { $basis_bilangan = 10;

$bilangan_prima = 10007;

$charArray = str_split($gram); $pangkat = count($charArray); $hash = 0;

foreach ($charArray as $karakter) {

$hash += (ord($karakter)*pow($basis_bilangan,($pangkat-1))); $pangkat--;

}

$total_hash = $hash;

$hasil = fmod($total_hash, $bilangan_prima); $arrayHash[] = $hasil;

}

return $arrayHash; }

function membuat_window($array, $window) { $arrayWindow = array();

for ($i = 0; $i < count($array) - $window + 1; $i++) { for ($j = $i; $j < $window + $i; $j++) {

$arrayWindow[$i][$j] = $array[$j]; }

}

return $arrayWindow; }

function finger_print($array) { $finger = array();

foreach ($array as $obj) { $finger[] = min($obj); }

return $finger; }

(7)

74 LAMPIRAN B: Hasil Pendekteksian Kesamaan

1. Pengujian pendeteksian kesamaan dengan proses

stemming

Jurnal Uji

Fingerprint

Jurnal Pembanding

Fingerprint

Fingerprint yang sama

Kesamaan

(%)

Lama

Proses (s)

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083,0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,20] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42]

…

Implementasi Steganografi

Pesan Text Ke Dalam File

Sound (.Wav) Dengan

Modifikasi Jarak Byte Pada

Algoritma Least Significant

Bit (Lsb)

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1569,30] [4704,32]

[1376,33] [223,37]

[175,39] [3860,44]

[4131,45] [680,46]

…

[187,2187] [677,1931]

[133,2643] [583,1394]

[2230,3977] [1071,3580]

[3978,763] [2384,6123]

[401,104] [45,1136] ...

21.27 ± 84.08

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083, 0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,20] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42]

…

Perancangan Perangkat Lunak

Steganografi Audio MP3

Menggunakan Metode Least

Significant Bit (LSB) Dengan

Visual Basic 6.0

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1647,30] [1154,31]

[1752,36] [1540,40]

[1144,43] [2311,48]

[3832,49] [1330,50]

…

[677,2100] [2049,7854]

[532,873] [866,3285]

[2091,4320] [400,1152]

[1071,6069] [931,25]

[3317,4561]

[2384,2531]

…

24.76 ± 63.33

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083, 0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,20] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42] …

Implementasi Sistem

Keamanan Data dengan

Menggunakan Teknik

Steganografi End of File

(EOF) dan Rabin Public Key

Cryptosystem

[3105,0] [5798,1]

[3458,2] [103,3]

[2517,8] [3100,9]

[712,10] [754,15]

[3921,20] [3074,21]

[634,23] [217,27]

[318,32] [5284,35]

[7783,35] [7072,36]

…

[906, 6232] [187, 13262]

[550, 1057] [2049, 11683]

[2684,1895] [3617, 3172]

[532, 5577] [2789, 4367]

[2383, 10775] [583, 5133]

…

(8)

75 Pengujian pendeteksian kesamaan dengan proses

stemming

(lanjutan)

Jurnal Uji

Fingerprint

Jurnal Pembanding

Fingerprint

Fingerprint yang sama

Kesamaan

(%)

Lama

Proses (s)

Implementasi

Kriptografi Dan

Steganografi

[1115,0] [446,2]

[1660,7] [2349,8]

[3234,9] [4009,11]

[882,12] [2202,17]

[1516,18] [1125,19]

[1929,24] [5270,27]

[3282,29] [420,30]

[3388,35] [3105,36] …

Implementasi Steganografi

Pesan Text Ke Dalam File

Sound (.Wav) Dengan

Modifikasi Jarak Byte Pada

Algoritma Least Significant

Bit (Lsb)

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1569,30] [4704,32]

[1376,33] [223,37]

[175,39] [3860,44]

[4131,45] [680,46]

…

[1115,1936] [1660,5500]

[882,1869] [2202,3814]

[3282,3652] [3105,324]

[2773,3707] [1646,1619]

[2177,7111] [858,842]

…

20.68 ±

61.67 Implementasi

Kriptografi Dan

Steganografi

[1115,0] [446,2]

[1660,7] [2349,8]

[3234,9] [4009,11]

[882,12] [2202,17]

[1516,18] [1125,19]

[1929,24] [5270,27]

[3282,29] [420,30]

[3388,35] [3105,36] …

Perancangan Perangkat Lunak

Steganografi Audio MP3

Menggunakan Metode Least

Significant Bit (LSB) Dengan

Visual Basic 6.0

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1647,30] [1154,31]

[1752,36] [1540,40]

[1144,43] [2311,48]

[3832,49] [1330,50]

…

[1660,7287] [2349,7794]

[3234,3791] [4009,2898]

[882,2038] [1516,6717]

[420,530] [3105,4360]

[5790,3720] [2773,3875]

…

22.40 ± 59.77

Implementasi

Kriptografi Dan

Steganografi

[1115,0] [446,2]

[1660,7] [2349,8]

[3234,9] [4009,11]

[882,12] [2202,17]

[1516,18] [1125,19]

[1929,24] [5270,27]

[3282,29] [420,30]

[3388,35] [3105,36] …

Implementasi Sistem

Keamanan Data dengan

Menggunakan Teknik

Steganografi End of File

(EOF) dan Rabin Public Key

Cryptosystem

[3105,0] [5798,1]

[3458,2] [103,3]

[2517,8] [3100,9]

[712,10] [754,15]

[3921,20] [3074,21]

[634,23] [217,27]

[318,32] [5284,34]

[7783,35] [7072,36] …

(9)

76 Pengujian pendeteksian kesamaan dengan proses

stemming

(lanjutan)

Jurnal Uji

Fingerprint

Jurnal Pembanding

Fingerprint

Fingerprint yang sama

Kesamaan

(%)

Metode Least

Significant Bit

(Lsb) Pada Mobile

Phone Berbasis

Symbian Os

[3105,0] [5798,1]

[4405,2] [3211,5]

[328,9] [5383,14]

[1313,15] [630,17]

[641,22] [2797,26]

[3514,27] [4921,28]

[4730,29] [2400,30]

[975,31] [1130,36]

…

Implementasi Steganografi

Pesan Text Ke Dalam File

Sound (.Wav) Dengan

Modifikasi Jarak Byte Pada

Algoritma Least Significant Bit

(Lsb)

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1569,30] [4704,32]

[1376,33] [223,37]

[175,39] [3860,44]

[4131,45] [680,46]

…

[3105,324] [5798,1710]

[4405,1711]

[3211,1714] [328,845]

[5383,850] [1313,2975]

[630,772] [641,3130]

[2797,3133]

…

20.83 ± 111.90

Implementasi

Steganography

Menggunakan

Metode Least

Significant Bit

(Lsb) Pada Mobile

Phone Berbasis

Symbian Os

[3105,0] [5798,1]

[4405,2] [3211,5]

[328,9] [5383,14]

[1313,15] [630,17]

[641,22] [2797,26]

[3514,27] [4921,28]

[4730,29] [2400,30]

[975,31] [1130,36]

…

Perancangan Perangkat Lunak

Steganografi Audio MP3

Menggunakan Metode Least

Significant Bit (LSB) Dengan

Visual Basic 6.0

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1647,30] [1154,31]

[1752,36] [1540,40]

[1144,43] [2311,48]

[3832,

49] [1330,50] …

[3105, 4360][4405, 477]

[3211, 311]

Metode Least

Significant Bit

(Lsb) Pada Mobile

Phone Berbasis

Symbian Os

[3105,0] [5798,1]

[4405,2] [3211,5]

[328,9] [5383,14]

[1313,15] [630,17]

[641,22] [2797,26]

[3514,27] [4921,28]

[4730,29] [2400,30]

[975,31] [1130,36]

…

Implementasi Sistem Keamanan

Data dengan Menggunakan

Teknik Steganografi End of File

(EOF) dan Rabin Public Key

Cryptosystem

[3105,0] [5798,1]

[3458,2] [103,3]

[2517,8] [3100,9]

[712,10] [754,15]

[3921,20] [3074,21]

[634,23] [217,27]

[318,32] [5284,34]

[7783,35] [7072,36]

…

[3105,0] [5798,1]

[4405,5681]

[2400,12816]

…

(10)

77

2. Pengujian pendeteksian kesamaan dengan tanpa proses

stemming

Jurnal Uji

Fingerprint

Jurnal Pembanding

Fingerprint

Fingerprint yang sama

Kesamaan

(%)

Lama

Proses (s)

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083,0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,24] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42]

…

Implementasi Steganografi

Pesan Text Ke Dalam File

Sound (.Wav) Dengan

Modifikasi Jarak Byte Pada

Algoritma Least Significant

Bit (Lsb)

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1361,30] [612,31]

[4006,36] [734,38]

[175,43] [3860,48]

[4131,49] [680,50] …

[906,9306] [677,2847]

[133,232] [550,3885]

[3140,7885] [4455,2921]

[2118,6556] [400,1552]

[583,1183] [302,151] …

34.13 ± 44.26

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083,0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,24] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42]

…

Perancangan Perangkat

Lunak Steganografi Audio

MP3 Menggunakan Metode

Least Significant Bit (LSB)

Dengan Visual Basic 6.0

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[914,30] [3545,35]

[7318,37] [4357,38]

[7156,43] [7069,44]

[3172,47] [996,50]

…

[2083,8649] [906,8591]

[187,1425] [677,3904]

[133,9325] [550,12663]

[2049,14397] [2684,12996]

[532,12370] [866,12750]

…

39.21 ± 38.11

Analisa PSNR

Pada Teknik

Steganografi

Menggunakan

Spread Spectrum

[2083,0] [906,4]

[187,8] [677,13]

[133,15] [550,20]

[2049,24] [2684,26]

[3617,29] [3140,30]

[532,32] [866,37]

[2091,38] [2789,40]

[4455,41] [4665,42] …

Implementasi Sistem

Keamanan Data dengan

Menggunakan Teknik

Steganografi End of File

(EOF) dan Rabin Public

Key Cryptosystem

[3105,0] [5798,1]

[3458,2] [103,3]

[2517,8] [4020,9]

[6145,12] [6506,13]

[4036,14] [688,16]

[2009,21] [4657,22]

[696,23] [1091,28]

[6146,32] [2048,33] …

[2083, 19135] [906, 350]

[187, 4960] [677, 1494]

[550, 1595] [2684, 5977]

[3617, 5657] [3140, 14386]

(11)

78 Pengujian pendeteksian kesamaan dengan tanpa proses

stemming

(lanjutan)

Jurnal Uji

Fingerprint

Jurnal Pembanding

Fingerprint

Fingerprint yang sama

Kesamaan

(%)

Lama

Proses (s)

Implementasi

Kriptografi Dan

Steganografi

[1667,0] [1503,2]

[337,7] [3234,12]

[4009,16] [882,17]

[2202,22] [1516,24]

[1125,29] [1929,32]

[5270,34] [3282,35]

[3388,40] [3105,41]

[5790,46

] …

Implementasi Steganografi

Pesan Text Ke Dalam File

Sound (.Wav) Dengan

Modifikasi Jarak Byte Pada

Algoritma Least Significant

Bit (Lsb)

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[1361,30] [612,31]

[4006,36] [734,38]

[175,43] [3860,48]

[4131,49] [680,50]

…

[1667, 2004] [337,133]

[4009,7525] [882,3324]

[2202,1244] [1516,5695]

[1929,6893] [3282,6456]

[3105,654] [5790,657] ...

30.93 ± 43.83

Implementasi

Kriptografi Dan

Steganografi

[1667,0] [1503,2]

[337,7] [3234,12]

[4009,16] [882,17]

[2202,22] [1516,24]

[1125,29] [1929,32]

[5270,34] [3282,35]

[3388,40] [3105,41]

[5790,46

] …

Perancangan Perangkat

Lunak Steganografi Audio

MP3 Menggunakan Metode

Least Significant Bit (LSB)

Dengan Visual Basic 6.0

[116,0] [652,4]

[173,7] [529,12]

[1056,17] [1023,19]

[848,23] [619,25]

[914,30] [3545,35]

[7318,37] [4357,38]

[7156,43] [7069,44]

[3172,47] [996,50]

…

[1667,6011] [1503,3331]

[337,195] [3234,7469]

[882,3839] [2202,1167]

[1516,12373] [3105,3534]

[5790,16245] [2773,7235]

…

34.62 ± 43.48

Implementasi

Kriptografi Dan

Steganografi

[1667,0] [1503,2]

[337,7] [3234,12]

[4009,16] [882,17]

[2202,22] [1516,24]

[1125,29] [1929,32]

[5270,34] [3282,35]

[3388,40] [3105,41]

[5790,46

] …

Implementasi Sistem

Keamanan Data dengan

Menggunakan Teknik

Steganografi End of File

(EOF) dan Rabin Public

Key Cryptosystem

[3105,0] [5798,1]

[3458,2] [103,3]

[2517,8] [4020,9]

[6145,12] [6506,13]

[4036,14] [688,16]

[2009,21] [4657,22]

[696,23] [1091,28]

[6146,32] [2048,33] …

[3105, 41] [103, 13765]

[4020, 11567] [4036, 11548]

[696, 8252] [1091, 95]

[6146, 100] [2048, 101]

(12)