Challenges I've made for public CTFs.
Fri, 18 Sept. 2020, 19:00 AEST — Sun, 20 Sept. 2020, 19:00 AEST
Website | CTFTime | Official Repository
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| rot-i | crypto | 👶 | 447 |
| babyrsa | crypto | ⭐️ | 144 |
| Extra Cool Block Chaining | crypto | ⭐️⭐️ | 52 |
| Hex Shift Cipher | crypto | ⭐️⭐️ | 44 |
| Cosmic Rays | crypto | ⭐️⭐️ | 25 |
| 1337crypt | crypto | ⭐️⭐️⭐️ | 3 |
| ImpECCable | crypto | ⭐️⭐️⭐️ | 3 |
| LSB||MSB Calculation Game | crypto | ⭐️⭐️⭐️ | 2 |
Fri, 24 Sept. 2021, 19:00 AEST — Sun, 26 Sept. 2021, 19:00 AEST
Website | CTFTime | Official Repository
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| no strings | reversing | 👶 | 934 |
| Substitution Cipher I | crypto | 👶 | 362 |
| Substitution Cipher II | crypto | ⭐️ | 155 |
| treasure | crypto | ⭐️ | 102 |
| flag loader | reversing | ⭐️ | 85 |
| write what where | pwn | ⭐️ | 70 |
| connect the dots | reversing | ⭐️⭐️ | 47 |
| ready, bounce, pwn! | pwn | ⭐️⭐️ | 41 |
| encrypted note | pwn | ⭐️⭐️⭐️ | 22 |
| flag checker | reversing | ⭐️⭐️⭐️ | 16 |
| gamer | reversing | ⭐️⭐️ | 15 |
| power sign | crypto | ⭐️⭐️⭐️ | 14 |
| yadlp | crypto | ⭐️⭐️⭐️ | 14 |
| flag printer | reversing | ⭐️⭐️ | 8 |
| bullet hell | reversing | ⭐️⭐️ | 7 |
| 1337crypt v2 | crypto | ⭐️⭐️⭐️ | 3 |
| Substitution Cipher III | crypto | ⭐️⭐️⭐️ | 1 |
Fri, 23 Sept. 2022, 19:30 AEST — Sun, 25 Sept. 2022, 19:30 AEST
Website | CTFTime | Official Repository
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| babyp(y)wn | pwn | 👶 | 643 |
| source provided | rev | 👶 | 365 |
| baby arx | crypto | 👶 | 279 |
| js lock | rev | ⭐️ | 136 |
| login | pwn | ⭐️ | 121 |
| oracle for block cipher enthusiasts | crypto | ⭐️ | 102 |
| cheap ring theory | crypto | ⭐️ | 101 |
| rsa interval oracle i | crypto | ⭐️ | 79 |
| noteworthy | web | ⭐️ | 60 |
| ezpz-rev | rev | ⭐️ | 42 |
| rsa interval oracle ii | crypto | ⭐️⭐️ | 36 |
| ezpz-pwn | pwn | ⭐️ | 33 |
| xva | rev | ⭐️⭐️ | 30 |
| last digit | misc | ⭐️ | 26 |
| Crypto Casino | blockchain | ⭐️ | 25 |
| rsa interval oracle iii | crypto | ⭐️⭐️ | 23 |
| click the flag | rev | ⭐️⭐️ | 18 |
| time locked | crypto | ⭐️⭐️ | 18 |
| battlesweeper | misc | ⭐️⭐️⭐️ | 18 |
| kv_db | pwn | ⭐️⭐️ | 17 |
| faulty arx | crypto | ⭐️⭐️⭐️ | 11 |
| file magic | misc | ⭐️⭐️ | 10 |
| pac | pwn | ⭐️⭐️ | 7 |
| rsa interval oracle iv | crypto | ⭐️⭐️⭐️ | 5 |
| EVM Vault Mechanism | blockchain | ⭐️⭐️⭐️ | 4 |
| 1337crypt v3 | crypto | ⭐️⭐️⭐️ | 2 |
| kyber± | crypto | ⭐️⭐️⭐️⭐️ | 1 |
Fri, 01 Sept. 2023, 19:30 AEST — Sun, 03 Sept. 2022, 19:30 AEST
Website | CTFTime | Official Repository
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| static file server | beginner | 👶 | 594 |
| downunderflow | beginner | 👶 | 521 |
| complementary | beginner | 👶 | 436 |
| randomly chosen | beginner | 👶 | 365 |
| flag art | beginner | 👶 | 285 |
| one byte | beginner | 👶 | 189 |
| confusing | beginner | 👶 | 157 |
| apbq rsa i | crypto | ⭐️ | 126 |
| masked squares flag checker | rev | ⭐️ | 62 |
| shifty mem | pwn | ⭐️⭐️ | 40 |
| mini dns server | misc | ⭐️⭐️ | 39 |
| sideways | rev | ⭐️⭐️ | 29 |
| fnv | crypto | ⭐️⭐️ | 27 |
| apbq rsa ii | crypto | ⭐️⭐️ | 26 |
| binary mail | pwn | ⭐️⭐️ | 26 |
| advanced vector expositions | rev | ⭐️⭐️⭐️ | 12 |
| lcg card gimmicks | crypto | ⭐️⭐️ | 11 |
| number theoretic flag checker | rev | ⭐️⭐️ | 9 |
| handshake | crypto | ⭐️⭐️⭐️ | 4 |
| encrypted mail | crypto | ⭐️⭐️⭐️ | 3 |
| dilithium± | crypto | ⭐️⭐️⭐️⭐️ | 0 |
Sun, 19 March 2023, 00:00 AEDT — Thu, 23 March 2023, 23:59 AEDT
HackTheBox approached me to develop these challenges, some details like the title and description for the challenges were created by them.
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| Colliding Heritage | crypto | ⭐️ | ? |
| Biased Heritage | crypto | ⭐️⭐️ | ? |
Sat, 20 January 2024, 11:00 AEDT — Sat, 20 January 2024, 18:00 AEDT
| Name | Category | Difficulty | Solves |
|---|---|---|---|
| Echo Command Breaker | crypto | ⭐️ | 17 |
| Greeter | pwn | ⭐️ | 9 |
| Ruby Chef | web | ⭐️⭐️⭐️ | 4 |
| ESPer Flag Checker | rev | ⭐️⭐️⭐️ | 3 |
| Cryptography 101 Final Exam | crypto | ⭐️⭐️ | 2 |
| Additional Emoji Suffering | crypto | ⭐️⭐️⭐️ | 2 |
| Discrete Leaky PRNG | crypto | ⭐️⭐️ | 1 |