Crypto 5

Crypto 5¶

📚 Category: Crypto
🎯 Points: 200
📝 Description: Use flagCheck to input the flag you get from the challenge to get the actual flag

✍️ Writeup¶

We one file:

chall.txt

Cipher text: JR UNIR QVFPBIRERQ GUNG BHE YNFG GUERR GENAFZVFFVBAF JR'ER RNFVYL QRPVCURERQ. JR UNIR GNXRA PNER BS GUR CNEGL ERFCBAFVOYR SBE GURVE RAPBQVAT NAQ NER ABJ HFVAT N ARJ ZRGUBQ. HFR GUR VASBEZNGVBA CEBIVQRQ NG YNFG JRRX.F ZRRGVAT GB QRPVCURE NYY ARJ ZRFFNTRF. NAQ ERZRZORE, GUVF JRRX.F XRL VF BOSHFPNGRQ.

This is a ROT13

WE HAVE DISCOVERED THAT OUR LAST THREE TRANSMISSIONS WE'RE EASILY DECIPHERED. WE HAVE TAKEN CARE OF THE PARTY RESPONSIBLE FOR THEIR ENCODING AND ARE NOW USING A NEW METHOD. USE THE INFORMATION PROVIDED AT LAST WEEK.S MEETING TO DECIPHER ALL NEW MESSAGES. AND REMEMBER, THIS WEEK.S KEY IS OBFUSCATED

Let's check with flagCheck

hacker@csawctf2011~crypto-200-5:/challenge$ ./flagCheck
Enter the flag: OBFUSCATED
Correct flag!
pwn.college{REDACTED}