| Date | User | Challenge | Score |
| tr011ist | RSA Signatures | 25 | |
| spotter | Manyprime | 40 | |
| lu_or_zzyycc | Greatest Common Divisor | 15 | |
| ruuz | Ellipse Curve Cryptography | 125 | |
| ragunogh | Broken RSA | 100 | |
| tank1st | Extended GCD | 20 | |
| aless | Favourite byte | 20 | |
| Zayn | Base64 | 10 | |
| Zayn | Hex | 5 | |
| lu_or_zzyycc | Lemur XOR | 40 | |
| tank1st | Greatest Common Divisor | 15 | |
| bluesky2113 | Logon Zero | 80 | |
| Zayn | ASCII | 5 | |
| lu_or_zzyycc | You either know, XOR you don't | 30 | |
| lu_or_zzyycc | Favourite byte | 20 | |
| Zayn | Great Snakes | 3 | |
| lu_or_zzyycc | XOR Starter | 10 | |
| lu_or_zzyycc | XOR Properties | 15 | |
| KowalskiVan | An Evil Twisted Mind | 175 | |
| Zayn | Finding Flags | 2 | |
| KowalskiVan | An Exceptional Twisted Mind | 125 | |
| Berwa_Ian_Ange | Bean Counter | 60 | |
| spotter | Monoprime | 30 | |
| spotter | Factoring | 15 | |
| spotter | RSA Signatures | 25 | |
| LePetitPrince | Finding Flags | 2 | |
| Berwa_Ian_Ange | Symmetry | 50 | |
| 26521111001 | Dancing Queen | 120 | |
| Garfild | Bytes and Big Integers | 10 | |
| skylight | RSA Signatures | 25 | |
| 26521111001 | Logon Zero | 80 | |
| Berwa_Ian_Ange | Flipping Cookie | 60 | |
| Zune | XOR Starter | 10 | |
| spotter | RSA Decryption | 20 | |
| spotter | Private Keys | 20 | |
| spotter | Euler's Totient | 20 | |
| RoninKJ | Chinese Remainder Theorem | 40 | |
| RoninKJ | Modular Square Root | 35 | |
| hoanhanhat1 | Great Snakes | 3 | |
| spotter | Public Keys | 15 | |
| spotter | Modular Exponentiation | 10 | |
| hoanhanhat1 | Finding Flags | 2 | |
| spotter | Bean Counter | 60 | |
| KowalskiVan | Exceptional Curves | 100 | |
| Garfild | Base64 | 10 | |
| spotter | Symmetry | 50 | |
| spotter | Flipping Cookie | 60 | |
| gioooo369 | Great Snakes | 3 | |
| Garfild | Hex | 5 | |
| ragunogh | Common Ground | 75 |
You are now level Current level