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UMDCTF 2021 - Hidden Card | Steg
Hidden Card My brother said he wrote on one of these cards with ink, but I can’t see it. Can you find out what it says? Solution This is the first challenge that I have gotten first blood in. This challenge would have been impossible for those who have never...
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Angstrom CTF 2021 - Keysar V2 | Crypto
Keysar V2 Wow! Aplet sent me a message… he said he encrypted it with a key, but lost it. Gotta go though, I have biology homework! Downloadable: chall.py Solution The given python file contains the following code: //Python import string with open("key.txt", "r") as f: shift = int(f.readline()) key =...
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ShaktiCon CTF 2021 - Find me | Forensics
Find me We found that there was a secret communication between two criminals. Can you find out the secret information? Downloadable: network2.pcap Solution I opened it on Wireshark and checked the TCP stream. There were two meaningful TCP stream. These seem like ASCII code, so I converted them into string...