Points: 35
Description:
ZY DHPUKYEHAURP, A JBSJKZKBKZYY DZURQH ZJ A TQKRYF YW QYDYFZYE SP MRZDR BYZKJ YW UVAZYKQOK AHQ HQUVADQF MZKR DZURQHKQOK, ADDYHFZYE KY A HQEBVAH JPJKQT; KRQ "BYZKJ" TAP SQ JZYEVQ VQKKQHJ (KRQ TYJK DYTTYY), UAZHJ YW VQKKQHJ, KHZUVQKJ YW VQKKQHJ, TZOKBHQJ YW KRQ ASYNQ, AYF JY WYHKR. WYH KRQ WVAE, ZK'J CQQUZKDVQAY
Hint:
Keyboard... substitution?
This is essentially a substitution cipher challenge. To make things easier, we used quipquip, which analyzes which English words could possibly make up the ciphertext. The highest ranked solution for this ciphertext was:
IO CRYPTOGRAPHY, A SUBSTITUTIOO CIPHER IS A METHOD OF EOCODIOG BY WHICH UOITS OF PLAIOTEXT ARE REPLACED WITH CIPHERTEXT, ACCORDIOG TO A REGULAR SYSTEM; THE 'UOITS' MAY BE SIOGLE LETTERS (THE MOST COMMOO), PAIRS OF LETTERS, TRIPLETS OF LETTERS, MIXTURES OF THE ABOVE, AOD SO FORTH. FOR THE FLAG, IT'S ~EEPITCLEAO
The last sentence, FOR THE FLAG, IT'S ~EEPITCLEAO, is what we are looking for. However, the most glaring error for the whole text is that the Ns were incorrectly interpreted as Os. The last sentence is now FOR THE FLAG, IT'S ~EEPITCLEAN. We inferred that the ~ is probably a K, which gives us the flag.
Flag: KEEPITCLEAN
- None.