CTF challenges & writeups

1454 challenges in family ⊕ crypto ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
RSA_School_1st_Grade #rsa #known-prime	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_2nd_Grade #rsa #factordb	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_3rd_Grade #rsa #common-modulus-attack	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_4th_Grade #rsa #d-to-factorization	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_5th_Grade #rsa #low-exponent #cube-root	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_6th_Grade #rsa #hastad-broadcast #crt	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_7th_Grade #rsa #fermat-factorization	BlueHens 2023	24.61	Crypto	files wu 1
RSA_School_8th_Grade #rsa #fermat-factorization	BlueHens 2023	24.61	Crypto	files wu 1
Super_Secure_Encryption #pyc-decompilation #pbkdf2-aes #hardcoded-key	CYBERGON 2023	–	Reverse	files wu 1
Barak #hessian-curve #ecdlp #pohlig-hellman	Crypto 2023	59.60	Misc	files wu 1
Blue_Office #lcg-keystream #seed-bruteforce #known-plaintext	Crypto 2023	59.60	Misc	files wu 1
Derik #elliptic-curve #cubic-to-weierstrass #z3	Crypto 2023	59.60	Misc	files wu 1
Did_it #oracle-set-membership-leak #quadratic-residue-mapping	Crypto 2023	59.60	Misc	files wu 1
Insights #rsa #predictable-private-exponent	Crypto 2023	59.60	Misc	files wu 1
Keymoted #ecc-over-composite #rsa #crt #factorization	Crypto 2023	59.60	Misc	files wu 1
Marjan #ecdsa #signature-forgery	Crypto 2023	59.60	Misc	files wu 1
Resuction #rsa #wiener-attack #bruteforce	Crypto 2023	59.60	Misc	files wu 1
Risk #rsa #special-form-primes #factorization	Crypto 2023	59.60	Misc	files wu 1
Roldy #order-preserving-encryption #binary-search-oracle	Crypto 2023	59.60	Misc	files wu 1
Suction #rsa #small-modulus #bruteforce	Crypto 2023	59.60	Misc	files wu 1
Fractional_Flag #rsa-variant #wiener-lattice-attack #small-private-exponent	Cryptoverse 2023	24.52	Crypto	files wu 1
Knapsack_vs_Backpack #subset-sum #greedy-knapsack #merkle-hellman #superincreasing-sequence	Cryptoverse 2023	24.52	Crypto	files wu 1
0ff_Again_On_Aga1n #binary-encoding #color-to-binary #image-decode	DEADFACE 2023	–	Crypto	files wu 1
B1Tz_and_B0tZ #multi-layer-encoding #binary #hex #rot13	DEADFACE 2023	–	Crypto	files wu 1
Cereal_Killer_02 #reversing #xor-rotating-key #known-plaintext	DEADFACE 2023	–	Reverse	files wu 2
Coin_Code #caesar-cipher	DEADFACE 2023	–	Crypto	files wu 1
HAM_JAM #morse-code #codablock-barcode #vigenere	DEADFACE 2023	–	Crypto	files wu 1
Letter_Soup #word-search #rot13	DEADFACE 2023	–	Crypto	files wu 1
Off_the_Rails #rail-fence-cipher	DEADFACE 2023	–	Crypto	files wu 1
Whats_the_Wallet #powershell-analysis #base64	DEADFACE 2023	–	Forensics	files wu 1
DesintegratedRSA #rsa #bit-flip-recovery #prime-reconstruction	DaVinciCTF 2023	29.26	Crypto	files wu 2
Magicplay #png-repair #file-signature-fix #forensics	DeconstruCT.F 2023	11.23	Forensics	files wu 1
4aes #aes #meet-in-the-middle (mitm)#bruteforce	Defcamp 2023 Quals	–	Crypto	files wu 1
BBBB #rsa #lcg #coppersmith	DiceCTF 2023	36.70	Crypto	files wu 1
ProvablySecure2 #xor	DiceCTF 2023	36.70	Crypto	files wu 2
not-baby-parallelism #reversing #cpp #custom-encoding	DiceCTF 2023	36.70	Reverse	files wu 1
seaside #csidh #isogeny #oblivious-transfer	DiceCTF 2023	36.70	Crypto	files wu 1
ARISAI #rsa #multi-prime-rsa #factorization	Glacier 2023	24.32	Crypto	files wu 1
Glacier_Spirit #cbc-mac #ctr #encrypt-and-mac	Glacier 2023	24.32	Crypto	files wu 1
Missing_Bits #rsa #partial-private-key #pem	Glacier 2023	24.32	Crypto	files wu 1

Challenges