This document discusses different types of cryptography techniques including anagrams, Playfair cipher, leet speak, and ASCII code. It provides examples of names and phrases encoded using each technique. For Playfair cipher, it shows how to encrypt and decrypt the phrase "Computer Information Internet Technology Research Club" using a 5x5 keyword square.

1. Cryptography
MarsW

2. PART A: Long Long ago…

3. Anagram
變位字

4. • Tom Marvolo Riddle -> I m Lord Voldemort
• O, Draconian devil! -> Leonardo da Vinci
• Oh, Lame Saint -> The Mona Lisa
• So dark the con of man -> Madonna of the rocks
http://wordsmith.org/anagram/index.html

5. 潮隨暗浪雪山傾，遠浦漁舟釣月明。
橋對寺門松徑小，檻當泉眼石波清。
迢迢綠樹江天曉，靄靄紅霞晚日晴。
遙望四邊雲接水，碧峰千點數鷗輕。
蘇軾 <題金山寺>

6. PART B: Code?

7. PART C
Cryptography

8. The KEY
Playfair

9. M A R S W
加密規則: 兩兩一組,相同插入x
B C D E F
1.兩個字母同一列,以右邊字母取代 G H I/J K L
2.兩個字母同一行,以下方字母取代 N O P Q T
3.以對角取代
U V X Y Z
Computer Information Internet Technology Research Club
Co mp ut er In fo rm at io nI nt er ne tx Te ch no lo gy Re se ar ch Cl ub
HVRNZNDSGPCTSAWOHPTGONDSQBPZQFHOOPHTKUSDEKRSHOFHGM

10. M A R S W
解密規則: 兩兩一組還原,去除x B C D E F
1.兩個字母同一列,以左邊字母還原 G H I/J K L
2.兩個字母同一行,以上方字母還原
3.以對角還原 N O P Q T
U V X Y Z
HVRNZNDSGPCTSAWOHPTGONDSQBPZQFHOOPHTKUSDEKRSHOFHGM
Co mp ut er In fo rm at io nI nt er ne tx Te ch no lo gy Re se ar ch Cl ub
Computer Information Internet Technology Research Club

13. Leet

14. "112."
"50.4*58."
"52.2*58."
"6.2*44.2*58."
"6.2*44.2*58."
"2.10*6.6*2.6*2.2*2.4*10.6*12.4*12.4*8.2*2.4*6."
"6.2*12.2*6.2*6.2*4.2*8.2*4.2*8.2*4.2*8.2*4.2*8.2*4.2*4."
"6.2*12.2*6.2*6.2*6.2*6.2*4.2*6.2*8.2*4.2*8.2*6.2*4.2*4."
"6.2*14.2*2.2*8.2*6.2*6.2*4.2*6.2*8.2*4.2*8.2*6.2*4.2*4."
"6.2*14.2*2.2*8.2*6.2*6.2*4.2*6.2*8.2*4.2*8.2*6.2*4.2*4."
"6.2*16.2*10.2*6.2*6.2*4.2*6.2*8.2*4.2*8.2*6.2*4.2*4."
"6.2*4.2*10.2*10.2*4.2*8.2*4.2*8.2*4.2*8.2*4.2*8.2*4.2*4."
"8.4*12.2*10.6*8.4*4.4*8.4*12.4*8.4*4.4*2."
"22.2*12.2*74."
"18.4*12.6*72."
"112."

15. ASCII