MarsW
December 09, 2009
48

# I2TRC2_2009-Cryptography

2009回雄女資訊社講課

## MarsW

December 09, 2009

## Transcript

1. Cryptography
MarsW

2. PART A: Long Long ago…

3. 變位字
Anagram

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. Playfair
The KEY

9. M A R S W
B C D E F
G H I/J K L
N O P Q T
U V X Y Z
加密規則: 兩兩一組,相同插入x
1.兩個字母同一列,以右邊字母取代
2.兩個字母同一行,以下方字母取代
3.以對角取代
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
B C D E F
G H I/J K L
N O P Q T
U V X Y Z
解密規則: 兩兩一組還原,去除x
1.兩個字母同一列,以左邊字母還原
2.兩個字母同一行,以上方字母還原
3.以對角還原
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

11. Leet

12. "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."

13. ASCII