CTF challenges & writeups

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

Challenge	CTF	Weight	Category	Has
CrookedRoulette #rsa-blinding-forgery	KITCTFCTF 2022	–	Crypto	files wu 1
PrimeGuesser1 #rlwe-key-recovery	KITCTFCTF 2022	–	Crypto	files wu 2
PrimeGuesser2 #rlwe-key-recovery	KITCTFCTF 2022	–	Crypto	files wu 2
Baby-rev #bruteforce-reversing	LakeCTF 2022 Quals	23.96	Reverse	files wu 2
NeutronMail #common-factor-gcd	LakeCTF 2022 Quals	23.96	Crypto	files wu 1
Verify #yara #rc4 #custom-vm	N1CTF 2022	77.68	Reverse	files wu 1
babyecc #ecc #coppersmith #crt	N1CTF 2022	77.68	Crypto	files wu 1
boxing #docker-layers #rsa	N1CTF 2022	77.68	Reverse	files wu 1
brand_new_checkin #extended-gcd #bruteforce	N1CTF 2022	77.68	Crypto	files wu 1
ezdlp #pollard-rho #discrete-log	N1CTF 2022	77.68	Crypto	files wu 1
ExponentialMachine #oracle #bruteforce	PwnMe 2022	–	Crypto	files wu 1
RsaMadness #rsa #weak-modulus	PwnMe 2022	–	Crypto	files wu 1
ToBasics #xor #weak-key	PwnMe 2022	–	Crypto	files wu 1
EllipticClockCrypto #pohlig-hellman #discrete-log	UIUCTF 2022	–	Crypto	files src
baby-rsa #rsa #known-prime #factorization	WRECKCTF 2022	–	Crypto	files wu 1
rsa #rsa #signing-oracle #blinding	WRECKCTF 2022	–	Crypto	files wu 1
spin #caesar-cipher	WRECKCTF 2022	–	Crypto	files wu 1
token #aes #pkcs7-padding #authentication-bypass	WRECKCTF 2022	–	Crypto	files wu 1
cloudpass #chacha20 #keystream-reuse #xor	0CTF 2021 Quals	–	Crypto	files wu 1
future #custom-isa #linear-algebra #matrix-inversion	0CTF 2021 Quals	–	Reverse	files wu 1
zer0lfsr #lfsr #stream-cipher-cryptanalysis #correlation-attack	0CTF 2021 Quals	–	Crypto	files wu 1
Delegate-wallet #lcg-prng-prediction #weak-randomness	0x41414141 2021	–	Crypto	files wu 2
crackme.sol #solidity-smart-contract-reversing #xor	0x41414141 2021	–	Crypto	files wu 1
crypto-casino #predictable-on-chain-randomness #keccak-prng #weak-seed	0x41414141 2021	–	Crypto	files wu 1
eazy-RSA #rsa #e-and-phi-not-coprime #modular-square-root #crt	0x41414141 2021	–	Crypto	files wu 3
factorize #rsa #fermat-factorization	0x41414141 2021	–	Crypto	files wu 3
secure-enclave #on-chain-secret-exposure #transaction-input-data-disclosure	0x41414141 2021	–	Crypto	files wu 1
staple-AES #aes-ecb #block-shuffling	0x41414141 2021	–	Crypto	files wu 2
x-and-or #xor-decrypted-self-modifying-code #mmap	0x41414141 2021	–	Reverse	files wu 3
SMS #custom-hash-collision #substitute-mix-shift	3kCTF 2021	24.14	Crypto	files wu 1
collapsed_license #constraint-solving #z3 #permutation	BSidesAhmedabad 2021	25.00	Reverse	files wu 1
intersection #go-reversing #modular-equations #z3	BSidesAhmedabad 2021	25.00	Reverse	files wu 1
they_were_eleven #lattice #crt	BSidesAhmedabad 2021	25.00	Crypto	files wu 1
Hashcrack101 #password-hash-cracking	BSidesSF 2021	23.94	Crypto	files wu 2
SecureAssetManager #mitm-protocol-tampering	BSidesSF 2021	23.94	Pwn	files wu 1
Damn_Randomware #rsa #leaked-private-key	BSidesTLV 2021	23.94	Crypto	files wu 1
Intellimage #hash-length-extension #exiftool-rce	BSidesTLV 2021	23.94	Web	files wu 1
Huge_Primes #integer-factorization #yafu	Block 2021	30.75	Web	files wu 2
its_just_an_xor #ptrace-anti-debug #xor	Block 2021	30.75	Reverse	files wu 1
Defective_RSA #rsa #eth-root #crt	BuckeyeCTF 2021	24.81	Crypto	files wu 1

Challenges