| Date | User | Challenge | Score |
| ChrisTls | Bit by Bit | 100 | |
| kerel | XOR Starter | 10 | |
| kerel | Bytes and Big Integers | 10 | |
| kerel | Base64 | 10 | |
| phantom_X | XOR Starter | 10 | |
| Thaimeo2006 | Factoring | 15 | |
| piotrjacak | Everything is Big | 70 | |
| Romyna | Nativity | 60 | |
| kerel | Hex | 5 | |
| Mateusz_Chech | Dancing Queen | 120 | |
| kerel | ASCII | 5 | |
| kerel | Great Snakes | 3 | |
| kerel | Finding Flags | 2 | |
| Mateusz_Chech | Logon Zero | 80 | |
| Romyna | MD0 | 80 | |
| piotrjacak | Modulus Inutilis | 50 | |
| ChrisTls | LFSR Destroyer | 250 | |
| phantom_X | Bytes and Big Integers | 10 | |
| montaoo | Decrypting TLS 1.3 | 35 | |
| Mateusz_Chech | CTRIME | 70 | |
| piotrjacak | Salty | 20 | |
| yasom2000 | Modular Arithmetic 1 | 20 | |
| piotrjacak | Manyprime | 40 | |
| ZanePlayer | Quadratic Residues | 25 | |
| Mateusz_Chech | Bean Counter | 60 | |
| Romyna | Size and Basis | 15 | |
| mio_norn124 | XOR Starter | 10 | |
| Mateusz_Chech | Symmetry | 50 | |
| pafcio | Symmetry | 50 | |
| Mateusz_Chech | Triple DES | 60 | |
| W4Z_1R4Z | You either know, XOR you don't | 30 | |
| ZanePlayer | Modular Inverting | 25 | |
| Azeflow | Great Snakes | 3 | |
| afonsomap | XOR Starter | 10 | |
| mio_norn124 | Bytes and Big Integers | 10 | |
| Azeflow | Finding Flags | 2 | |
| afonsomap | Bytes and Big Integers | 10 | |
| omelet | Fast Primes | 75 | |
| Lethios | JSON in JSON | 40 | |
| Romyna | Backpack Cryptography | 120 | |
| CCcat | Smooth Criminal | 60 | |
| TSL | Greatest Common Divisor | 15 | |
| ChrisTls | Authenticated Handshake | 40 | |
| piotrjacak | Square Eyes | 35 | |
| Mateusz_Chech | Lazy CBC | 60 | |
| Lethios | RSA or HMAC? | 35 | |
| Mateusz_Chech | Flipping Cookie | 60 | |
| Mateusz_Chech | ECB Oracle | 60 | |
| Romyna | Find the Lattice | 100 | |
| Mateusz_Chech | ECB CBC WTF | 55 |
You are now level Current level