CTF challenges & writeups

151 challenges in family ⊕ crypto:rsa ✕ clear · browse all techniques

Challenge	CTF	Weight	Category	Has
ecchimera #ecc-over-zmod-n #smart-attack #pohlig-hellman #crt	Crypto 2021	36.00	Misc	files wu 1
hamul #rsa #factoring-concatenated-primes	Crypto 2021	36.00	Misc	files wu 1
BootlessRSA #rsa #low-exponent #cube-root	DaVinciCTF 2021	24.50	Crypto	files wu 3
TheMoreTheLess #rsa #multiprime #factordb	DaVinciCTF 2021	24.50	Crypto	files wu 2
Really_Secure_Algorithm #rsa #wiener-attack	DawgCTF 2021	23.29	Crypto	files wu 3
The_Obligatory_RSA_Challenge #rsa #factordb	DawgCTF 2021	23.29	Crypto	files wu 3
RSA-1 #rsa #rsactftool #small-factor	DeconstruCT.F 2021	19.69	Crypto	files wu 3
RSA-2 #rsa #low-exponent #cube-root	DeconstruCT.F 2021	19.69	Crypto	files wu 3
RSA-3 #rsa #wiener-attack	DeconstruCT.F 2021	19.69	Crypto	files wu 3
babycrypto3 #rsa-cm-factorization	LINE 2021	–	Crypto	files wu 3
Size_Matters #rsa-factorization	MetaCTF 2021	–	Crypto	files wu 3
xorsa #xor-leak-factoring #bit-by-bit-factoring #rsa	PlaidCTF 2021	99.64	Crypto	files wu 3
Uncommon_Factors_II #rsa #implicit-factoring #lll (lll-lattice-reduction)	RCTF 2021	–	Crypto	files wu 1
Baby-RSA #rsa #factordb	S4CTF 2021	24.52	Crypto	files wu 1
Special #rsa #special-primes	Securinets 2021 Quals	41.71	Crypto	files wu 1
MultipleExponents #rsa #common-modulus	SunshineCTF 2021	23.34	Crypto	files wu 2
Basic_RSA #rsa #factorization	TAMUctf 2021	–	Crypto	files wu 3
Common_Factor #rsa #common-factor	TMUCTF 2021	–	Crypto	files wu 2
beginners_crypto_2021 #rsa #common-modulus #low-exponent	TSG 2021	–	Crypto	files wu 1
minimalist's_private #rsa #factorization	TSG 2021	–	Crypto	files wu 1
Office_Secrets #rsa #common-modulus-attack	UMDCTF 2021	–	Crypto	files wu 1
alice_bob_dave #rsa #common-prime #gcd	Zh3r0 2021	–	Crypto	files src wu 2
RSASSS #rsa #hastad-broadcast-attack #crt	b01lers 2021	22.99	Crypto	files wu 1
Reasonable_Security_Ahead #rsa #franklin-reiter-related-message #coppersmith	b01lers 2021	22.99	Crypto	files wu 1
4096 #rsa #smooth-modulus-factorization	corCTF 2021	24.92	Crypto	files wu 3
babyrsa #rsa #partial-prime-recovery	corCTF 2021	24.92	Crypto	files wu 1
supercomputer #prime-power-modulus-factorization	corCTF 2021	24.92	Crypto	files wu 2
Risk_Security_Analyst_Alice_Vs_Eve #rsa #shared-modulus #factor-n-via-d	darkCON 2021	24.06	Crypto	files wu 3
babysign #rsa-signature-forgery	m0leCon 2021 Quals	24.55	Crypto	files wu 1
Rabin_To_The_Rescue #fermat-factorization	niteCTF 2021	–	Crypto	files wu 2
not_mordell_primes #rsa #elliptic-curve #resultant #point-recovery	zer0pts 2021	24.56	Crypto	files wu 1
signme #rsa #signature-forgery #weak-prng #seed-bruteforce	zer0pts 2021	24.56	Crypto	files wu 1
warsamup #rsa #franklin-reiter #related-message	zer0pts 2021	24.56	Crypto	files wu 3
dyrpto #coppersmith-short-pad #franklin-reiter #rsa #small-e	PlaidCTF 2020	93.15	Crypto	files wu 2
SuperSecureVault #crt #modular-arithmetic	Pragyan 2019	20.69	Misc	files wu 1
john_pollard #rsa #small-modulus-factoring #x509-certificate	picoCTF 2019	–	Crypto	files wu 2
miniRSA #rsa #small-e #cube-root	picoCTF 2019	–	Crypto	files wu 1
secretnote #coppersmith	HITCON 2018	–	Misc	files wu 1
forgetful #rsa #phi-multiple-leak #factoring	plfanzen 2026	25.00	Crypto	files wu 1
basic_sums #digit-sum-crt	KalmarCTF 2025	33.89	Crypto	files wu 2

Challenges