#rsa CTF challenges
112 CTF challenges using rsa from 58 CTFs (2019–2026), 112 with writeups. Mostly Crypto (95%).
Often combined with
#crt 8 #factordb 7 #hastad-broadcast 6 #factorization 6 #wiener-attack 5 #low-exponent 5 #coppersmith 5 #common-modulus-attack 4 #cube-root 4 #fermat-factorization 4 #small-private-exponent 3 #common-factor 3 #multiprime 3 #franklin-reiter 3 #hastad-broadcast-attack 2
Challenges
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| Challenge | CTF | Weight | Category | Has |
|---|---|---|---|---|
| iheartrsa | TJCTF 2023 | – | Crypto | files wu 1 |
| Reasonable_Security_Ahead | b01lers 2021 | 22.99 | Crypto | files wu 1 |
| nom_nom | VuwCTF 2026 | 25.00 | Crypto | files wu 1 |
| Noob_RSA_Returns | BITSCTF 2025 | – | Crypto | files wu 1 |
| PQ | VolgaCTF 2024 Quals | 35.91 | Crypto | files wu 1 |
| RSA_School_7th_Grade | BlueHens 2023 | 24.61 | Crypto | files wu 1 |
| RSA_School_8th_Grade | BlueHens 2023 | 24.61 | Crypto | files wu 1 |
| pqqp | WaniCTF 2023 | 24.99 | Crypto | files wu 1 |
| factor-master | TJCTF 2022 | – | Crypto | files wu 1 |
| minimalist's_private | TSG 2021 | – | Crypto | files wu 1 |
| hamul | Crypto 2021 | 36.00 | Misc | files wu 1 |
| Not_Baby | PBjar 2021 | 23.18 | Crypto | files wu 1 |
| RSA2 | BYUCTF 2023 | – | Crypto | files wu 1 |
| RSA_School_2nd_Grade | BlueHens 2023 | 24.61 | Crypto | files wu 1 |
| Baby-RSA | S4CTF 2021 | 24.52 | Crypto | files wu 1 |
| Defective_RSA | BuckeyeCTF 2021 | 24.81 | Crypto | files wu 1 |
| not_mordell_primes | zer0pts 2021 | 24.56 | Crypto | files wu 1 |
| ezcoppersmith | CyberSpace 2024 | 24.83 | Crypto | files wu 1 |
| RSAphantine | Crypto 2021 | 36.00 | Misc | files wu 1 |
| RSA_School_4th_Grade | BlueHens 2023 | 24.61 | Crypto | files wu 1 |
| RSA_Recycle | ToH 2025 | 24.27 | Crypto | files wu 1 |
| RSA5 | BYUCTF 2023 | – | Crypto | files wu 1 |
| RSA_School_3rd_Grade | BlueHens 2023 | 24.61 | Crypto | files wu 1 |
| Office_Secrets | UMDCTF 2021 | – | Crypto | files wu 1 |
| beginners_crypto_2021 | TSG 2021 | – | Crypto | files wu 1 |
| escrime | Securinets 2022 Quals | 50.11 | Crypto | files wu 1 |
| RSA3 | BYUCTF 2023 | – | Crypto | files wu 1 |
| DamaS | ASIS 2021 Quals | 89.22 | Crypto | files wu 1 |
| really-small-algorithm | HSCTF 2023 | – | Crypto | files wu 1 |
| asr | UIUCTF 2022 | – | Crypto | files src wu 1 |
| 3_spies | Pearl 2024 | 23.95 | Crypto | files wu 1 |
| Hextrap | V1T 2026 | 22.14 | Crypto | files wu 1 |