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      <title>Asas Sains Komputer [Bab 2 : Perwakilan Data] by LAAVENIA A/P RAVIMARAN Moe</title>
      <link>https://padlet.com/m10564773/rgxe25obrqkiwgll</link>
      <description>2.1.3 - Menghasil dan Menterjemah Mesej Menggunakan Kaedah Sifer</description>
      <language>en-us</language>
      <pubDate>2024-08-15 14:27:41 UTC</pubDate>
      <lastBuildDate>2024-08-15 14:28:08 UTC</lastBuildDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702178</link>
         <description><![CDATA[<ul><li><p>Cara songsangan dalam proses penyulitan dan nyahsulit mesej</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702181</link>
         <description><![CDATA[<p>i) Songsangan dilakukan berdasarkan adjad</p><ul><li><p>-Setiap abjad dalam setiap perkataan akan disongsangkan</p><p>-abjad bermula dari A to Z akan disongsangkan </p></li><li><p>Ex: </p><p>ABCDEFGHIJKLMNOPQRSTUVWXYZ</p><p><mark>ZYXWVUTSRQPONMLKJIHGFEDCBA </mark></p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702182</link>
         <description><![CDATA[<p>ii) Songsangan dilakukan berdasarkan perkataan</p><ul><li><p>-Setiap perkataan dalam mesej akan disongsangkan</p></li><li><p>Ex: </p><p>ABCD EFGH IJKL</p><p><mark>DCBA HGFE LKJI </mark></p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702183</link>
         <description><![CDATA[<p>iii) Songsangan dilakukan berdasarkan seluruh mesej</p><ul><li><p><sub>- </sub>Seluruh mesej disongsangkan</p></li><li><p>Ex: </p><p>ABCD EFGH IJKL</p><p><mark>LKJI HGFE DCBA </mark></p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702187</link>
         <description><![CDATA[<p>Terdapat dua jenis kaedah transposition iaitu Columnar Transpostion dan Rail Fence Cipher</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title>Columnar Cipher</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702191</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702194</link>
         <description><![CDATA[<p>Columnar Cipher ialah satu contoh <mark>sifer transposisi</mark> yang <mark>menyulitkan satu mesej</mark> dengan <mark>menulisnya dalam jadual secara mendatar (</mark><em><mark>horizontal</mark></em><mark>) dengan bilangan lajur (</mark><em><mark>column</mark></em><mark>) </mark>yang telah ditetapkan. Satu perkataan dipilih untuk dijadikan kunci penyulitan. Bilangan abjad dalam kunci akan menentukan cara bagi mengubah urutan abjad-abjad dalam mesej. Setiap abjad dalam mesej  akan ditulis pada setiap petak dalam jadual.</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title>Contoh 2.3 (Penyulitan menggunakan Columnar Transposition)</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702198</link>
         <description><![CDATA[<p>Langkah-langkah untuk menyulitkan teks biasa: <strong>MAKLUMAT MESYUARAT AKADEMIK</strong></p><p><br></p><p><em>Langkah 1:</em></p><p>Kenal pasti kunci yang ingin digunakan. Katakan perkataan <mark>BOLA</mark> digunakan sebagai sebagai kunci. Bina jadual seperti bawah. Kemudian, isikan baris yang seterusnya, iaitu abjad A = 1, B = 2, L = 3 dan O = 4. </p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702202</link>
         <description><![CDATA[<p><em>Langkah 2:</em></p><p>Gunakan formula yang berikut untuk <mark>menghitung bilangan baris</mark> yang diperlukan dalam jadual.</p><p><br></p><p>Bilangan baris= Bilangan abjad dalam teks biasa / Bilangan abjad dalam kunci</p><p><br></p><p>= 25/4</p><p><br></p><p>= 6.25</p><p><br></p><p>=7 baris</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702209</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702215</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title>Contoh 2.4 (Nyahsulit menggunakan Columnar Transposition)</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702220</link>
         <description><![CDATA[<p>Ramli menerima teks sifer dan kunci daripada pelatih bola sepaknya seperti yang ditunjukkan di bawah :</p><p><br></p><p>Teks sifer : E I E A L A N P K I A K S A D M O P A E P N S X R N E X E B</p><p><br></p><p><em>Langkah 1:</em></p><p>Bina satu jadual dan <mark>isikan abjad-abjad kunci</mark> seperti di bawah. Kemudian,  isikan baris yang seterusnya dengan nombor berdasarkan susunan abjad, abjad I = 1 dan seterusnya.</p><p><br></p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702224</link>
         <description><![CDATA[<p><em>Langkah 2:</em></p><p>Bilangan baris yang diperlukan dapat diperoleh daripada formula yang berikut:</p><p><br></p><p>Bilangan baris = Bilangan abjad dalam teks sifer / Bilangan abjad dalam kunci</p><p><br></p><p>=30 / 5</p><p><br></p><p>= 6 baris</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702230</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702235</link>
         <description><![CDATA[<p>Berdasarkan jadual dari langkah 2, anda dapat menuliskan teks biasa dari <mark>kiri ke kanan secara mendatar</mark> (horizontal) bermula dengan <mark>baris pertama</mark>.</p>]]></description>
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      <item>
         <title>Rail Fence Cipher</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702240</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702242</link>
         <description><![CDATA[<p>Rail Fence Cipher juga disebut sebagai <em><mark>zig-zag cipher</mark></em>. Cara penyulitan ialah seperti namanya, iaitu abjad-abjad dalam teks biasa ditulis semula mengikut susunan baris demi baris dan mengikut corak <em>zig-zag</em> seperti pagar. </p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702243</link>
         <description><![CDATA[<p>Cara untuk menyulit menggunakan kaedah Rail Fence cipher</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702244</link>
         <description><![CDATA[<p>Langkah pertama bagi nyahsulit menggunakan kaedah Rail Fence cipher</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702246</link>
         <description><![CDATA[<p>Cara untuk nyahsulit dengan kaedah Rail Fence cipher</p><p><br></p>]]></description>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702247</link>
         <description><![CDATA[<ul><li><p>Proses penyulitan dan nyahsulit dilakukan guna pelbagai kaedah sifer.</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702248</link>
         <description><![CDATA[<ul><li><p>Reverse Cipher</p><p>-Songsangan dilakukan berdasarkan adjad</p><p>-Songsangan dilakukan berdasarkan perkataan</p><p>-Songsangan dilakukan berdasarkan seluruh mesej</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702249</link>
         <description><![CDATA[<ul><li><p>Substitution cipher</p><p>-Caesar Cipher</p><p>-Pigpen cipher</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702250</link>
         <description><![CDATA[<ul><li><p>Transposition cipher</p><p>-Columnar transposition</p><p>- Rail Fence Cipher</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702251</link>
         <description><![CDATA[]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702253</link>
         <description><![CDATA[<p>--&gt; Substitution cipher menyulitkan mesej dengan menggantikan setiap unit teks biasa <mark>(abjad, pasangan abjad, atau kumpulan abjad)</mark> dengan unit teks lain. Rajah 2.6 menunjukkan dua contoh teknik ini. </p><p><br></p><p>--&gt; Monoalphabetic substitution adalah jenis substitution cipher yang <mark>paling mudah</mark>, di mana <mark>setiap abjad teks biasa digantikan dengan abjad lain</mark>. <mark>Caesar Cipher dan Pigpen Cipher</mark> adalah contoh monoalphabetic substitution.</p><p><br></p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title>1) Caesar cipher</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702256</link>
         <description><![CDATA[<pre><code>- Caesar Cipher adalah kaedah penyulitan awal yang menggantikan setiap abjad dalam teks dengan abjad lain melalui anjakan dalam susunan abjad. 

- Anjakan ini, dikenali sebagai kunci, boleh diwakili dengan sebarang simbol, contohnya K = 5, yang bermaksud anjakan lima tempat ke kanan. Rajah 2.7 menunjukkan contoh anjakan K = 5. </code></pre><p><br></p><ul><li><p>Dalam <em>Caesar Cipher</em>, abjad 'A' digantikan dengan 'V', 'B' dengan 'W', dan seterusnya, bergantung pada nilai kunci K yang ditentukan oleh pengirim mesej.</p></li></ul>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702257</link>
         <description><![CDATA[<p>--&gt; Penyulitan menggunakan Caesar Cipher</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702260</link>
         <description><![CDATA[<p>--&gt; Nyahsulit menggunakan Caesar Cipher.</p>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title>2) Pigpen cipher</title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702264</link>
         <description><![CDATA[<pre><code>- Pigpen Cipher adalah substitution cipher geometri yang mudah, di mana setiap abjad digantikan dengan simbol grafik tertentu. 

- Proses penyulitan dan nyahsulit mudah jika simbol grafik dan kunci dikenali, seperti yang ditunjukkan dalam Rajah 2.8.</code></pre>]]></description>
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         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
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      <item>
         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702267</link>
         <description><![CDATA[<p>--&gt; Penyulitan menggunakan Pigpen Cipher</p>]]></description>
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         <title></title>
         <author>m10564773</author>
         <link>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702270</link>
         <description><![CDATA[<p>--&gt; Nyahsulit menggunakan Pigpen Cipher</p>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/1951107173/6b8028b0134d60d0c982303228e3169e/image.png" />
         <pubDate>2024-08-15 14:27:41 UTC</pubDate>
         <guid>https://padlet.com/m10564773/rgxe25obrqkiwgll/wish/3076702270</guid>
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