| Date | User | Challenge | Score |
| zozimo | XOR Starter | 10 | |
| PrinfD | Favourite byte | 20 | |
| katanabeneficial | You either know, XOR you don't | 30 | |
| PrinfD | XOR Properties | 15 | |
| factual117 | Bytes and Big Integers | 10 | |
| PrinfD | XOR Starter | 10 | |
| TrUnChEoN | Greatest Common Divisor | 15 | |
| zozimo | Bytes and Big Integers | 10 | |
| PrinfD | Base64 | 10 | |
| pentestmonkey | Salty | 20 | |
| factual117 | Base64 | 10 | |
| vivisect0r | Endless Emails | 150 | |
| Wosyx | You either know, XOR you don't | 30 | |
| sleezy | Hex | 5 | |
| PrinfD | Hex | 5 | |
| Def4ult | Round Keys | 20 | |
| voqkrye | Where's the Supersingular Curve | 25 | |
| PrinfD | ASCII | 5 | |
| Legi0n | Network Attacks | 5 | |
| sleezy | ASCII | 5 | |
| LingLing_at_CH | Structure of AES | 15 | |
| Qu1n7as | Montgomery's Ladder | 40 | |
| factual117 | Hex | 5 | |
| sleezy | Great Snakes | 3 | |
| sleezy | Finding Flags | 2 | |
| factual117 | Network Attacks | 5 | |
| blueketchup | Montgomery's Ladder | 40 | |
| LingLing_at_CH | Resisting Bruteforce | 10 | |
| LingLing_at_CH | Keyed Permutations | 5 | |
| lucy54 | Export-grade | 100 | |
| LingLing_at_CH | Modular Inverting | 25 | |
| PrinfD | Network Attacks | 5 | |
| LingLing_at_CH | Modular Arithmetic 2 | 20 | |
| 0_0A | Great Snakes | 3 | |
| 0_0A | Finding Flags | 2 | |
| NioZow | Backpack Cryptography | 120 | |
| RotaJakiro | Endless Emails | 150 | |
| factual117 | ASCII | 5 | |
| PrinfD | Great Snakes | 3 | |
| PrinfD | Finding Flags | 2 | |
| Thorbeam | Bounded Noise | 50 | |
| afrdian | Size and Basis | 15 | |
| zozimo | Base64 | 10 | |
| factual117 | Great Snakes | 3 | |
| GINO_IL_P4TATINO | Chinese Remainder Theorem | 40 | |
| tehreemiqbal | RSA Decryption | 20 | |
| sarahhartley | Base64 | 10 | |
| tehreemiqbal | Private Keys | 20 | |
| factual117 | Finding Flags | 2 | |
| MagicLP11 | Modular Arithmetic 1 | 20 |
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