Wechall - Substitution I

Crypto - Simple Substitution I

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Oh dear, I guess you have cracked the two caesar cryptos...
This one is more difficult. Although a simple substitution is easily cracked...
Again the characters are limited to A-Z... 
But I think I can come up with a 256 version again.

Enjoy!

FW TBY IQOAEBTW ELG WLZ JIS KYIG TBAP OW CKAYSG A IO AOMKYPPYG UYKW XYQQ GLSY WLZK PLQZTALS NYW AP LICIJKIBCBAI TBAP QATTQY JBIQQYSEY XIP SLT TLL BIKG XIP AT

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Solution

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워게임 특성 상 solution, key, password, challenge, here 등이 나옴.

solution으로 보면 8글자 단어인 IQOAEBTW, PLQZTALS 보면 앞 뒤로 2번째에 같은 값을 가진 PLQZTALS가 solution이라 생각하고 해보면 됨.

따라서 P - S, L - O, Q - L, Z - U, T - T, A - I, S - N

또한 solution 다음엔 is 또는 key 이런것이 오기 때문에 추측해보자면 N - K, Y - E, W - Y, A - I, P - S 이고 위에서 찾아낸 내용과 똑같음.

challenge로 보면 JBIQQYSEY이 challenge가 됨. 따라서 J - C, B - H, I - A, Q - L, Y - E, S - N, E - G

따라서 이를 토대로 치환하면 다음과 같음.

FY THE ALOIGHTY GOG YOU CAN KEAG THIS OY CKIENG I AO IOMKESSEG UEKY XELL GONE YOUK SOLUTION KEY IS OACACKAHCHIA THIS LITTLE CHALLENGE XAS NOT TOO HAKG XAS IT

FY는 Y로 끝나는 2글자 단어인 by, my 중 하나 일 것임.

I AO는 I AM일 것이기 때문에 O - M 그러므로 F - B

XAS는 WAS이므로 X - W

HAKG는 HARD이므로 K - R, G - D

따라서 GOG - GOD, KEAG - READ O - M, F - B, X - W, K - R, G - D

BY THE ALMIGHTY GOD YOU CAN READ THIS MY CRIEND I AM IMMRESSED UERY WELL DONE YOUR SOLUTION KEY IS OACACRAHCHIA THIS LITTLE CHALLENGE WAS NOT TOO HARD WAS IT

CRIEND - FRIEND -> C - F

IMMRESSED - IMPRESSED -> M - P

UERY - VERY - > U - V

따라서 위에 대로 치환하면 아래와 같이 나오게 됨.

BY THE ALMIGHTY GOD YOU CAN READ THIS MY FRIEND I AM IMPRESSED VERY WELL DONE YOUR SOLUTION KEY IS OAFACRAHFHIA THIS LITTLE CHALLENGE WAS NOT TOO HARD WAS IT

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