| Date | User | Challenge | Score |
| ksenija | Passwords as Keys | 50 | |
| simrol260 | Favourite byte | 20 | |
| Zxum43a1 | Base64 | 10 | |
| monusuper | Great Snakes | 3 | |
| simrol260 | XOR Properties | 15 | |
| misfitx | Greatest Common Divisor | 15 | |
| wilex11 | MD0 | 80 | |
| DeusVultInfidel | You either know, XOR you don't | 30 | |
| ksenija | Modes of Operation Starter | 15 | |
| vivisect0r | Dancing Queen | 120 | |
| falconejulian | SIDH Key Exchange | 80 | |
| ksenija | Bringing It All Together | 50 | |
| shakarora | RSA Decryption | 20 | |
| falconejulian | Breaking SIDH | 250 | |
| shakarora | Modular Exponentiation | 10 | |
| d0577 | Network Attacks | 5 | |
| Zxum43a1 | Hex | 5 | |
| r0hit | Moving Problems | 150 | |
| ksenija | Diffusion through Permutation | 30 | |
| Zxum43a1 | ASCII | 5 | |
| DeusVultInfidel | Favourite byte | 20 | |
| Marco89 | Legendre Symbol | 35 | |
| falconejulian | CSIDH Key Exchange | 90 | |
| DeusVultInfidel | XOR Properties | 15 | |
| Vinjr | Special Soundness | 25 | |
| KarlGoodGuy | Too Many Errors | 100 | |
| ksenija | Confusion through Substitution | 25 | |
| NPeter | JWT Secrets | 25 | |
| NPeter | No Way JOSE | 20 | |
| NPeter | JWT Sessions | 10 | |
| DeusVultInfidel | XOR Starter | 10 | |
| NPeter | Token Appreciation | 5 | |
| panman4040 | You either know, XOR you don't | 30 | |
| DeusVultInfidel | Bytes and Big Integers | 10 | |
| KA183R | XOR Starter | 10 | |
| ksenija | Round Keys | 20 | |
| NPeter | Marin's Secrets | 50 | |
| NPeter | Infinite Descent | 50 | |
| falconejulian | Dual Masters | 90 | |
| falconejulian | CERTainly not | 30 | |
| NPeter | Fast Primes | 75 | |
| jlm | XOR Starter | 10 | |
| ksenija | Structure of AES | 15 | |
| Zxum43a1 | Great Snakes | 3 | |
| Neuvillette | Manyprime | 40 | |
| Neuvillette | Square Eyes | 35 | |
| evarist | Smooth Criminal | 60 | |
| Neuvillette | Monoprime | 30 | |
| Neuvillette | Inferius Prime | 30 | |
| Neuvillette | Factoring | 15 |
You are now level Current level