i2trc2 2009-cryptography

Cryptography

MarsW

PART A: Long Long ago…

變位字

Anagram

• 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

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>

PART B: Code?

PART C Cryptography

Playfair

The KEY

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

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

Leet

"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."

ASCII