Interstellar Chat
This is a challenge from Cryptography section of Standcon 2021. The challenge uses AES_CTR to encrypt stuff
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Mind Reader
This is a challenge from Cryptography section of Standcon 2021. The challenge wants us to break the PRNG system.
Rocket Ship Academy
This is a challenge from Cryptography section of Standcon 2021. The challenge provide you an encrypted text and a decryption oracle.
Substitution Extreme
This is a challenge from Cryptography section of Standcon 2021. The challenge used subsitution cipher to encrypt a text.
Space Papaya
This is a challenge from Cryptography section of Standcon 2021. The challenge used bad parameters for RSA encryption
Live From Serangoon Road
This is the third challenge from the Crypto section of CTF SG 2021. The challenge needs us to break a Stream Cipher that uses 4 LFSR.
GRIC
This is the second challenge from the Crypto section of CTF SG 2021. The challenge needs us to find out the checksum letter when given a 10 digit number.
Long Long Encrypt
This is the first challenge from the Crypto section of CTF SG 2021. The challenge introduced a different variation of RSA that uses \(n = p^{q}\)
YALA (PART 1)
This is the fourth challenge from the Mobile section of DSO-NUS CTF 2021. The challenge needs us to brute force the password for the user.
Sekret
This is the second challenge from the Mobile section of DSO-NUS CTF 2021. The challenge needs us to find the password of a user using OSINT.