| Date | User | Challenge | Score |
| ameermouhammed | Hex | 5 | |
| ProMoh1111 | Hex | 5 | |
| ProMoh1111 | ASCII | 5 | |
| LtLightman | Base64 | 10 | |
| benzabonanza | XOR Properties | 15 | |
| LtLightman | Hex | 5 | |
| ProMoh1111 | Great Snakes | 3 | |
| Sherpearce | Chinese Remainder Theorem | 40 | |
| ameermouhammed | ASCII | 5 | |
| ProMoh1111 | Finding Flags | 2 | |
| LtLightman | ASCII | 5 | |
| TheFlamingCrab | Passwords as Keys | 50 | |
| f1023n | XOR Properties | 15 | |
| Raphael96 | Hex | 5 | |
| LtLightman | Great Snakes | 3 | |
| LtLightman | Finding Flags | 2 | |
| hello5263 | Modular Arithmetic 2 | 20 | |
| Anti_ | Sharks on the Wire | 10 | |
| hanahiennguyen | No Way Back Home | 100 | |
| User0069 | Noise Cheap | 90 | |
| benzabonanza | XOR Starter | 10 | |
| Cookies_ | Bringing It All Together | 50 | |
| bobiealice | Extended GCD | 20 | |
| ameermouhammed | Great Snakes | 3 | |
| ameermouhammed | Finding Flags | 2 | |
| Raphael96 | ASCII | 5 | |
| TheFlamingCrab | Modes of Operation Starter | 15 | |
| hello5263 | Modular Inverting | 25 | |
| Cookies_ | Diffusion through Permutation | 30 | |
| Chtupv_22 | Legendre Symbol | 35 | |
| hello5263 | Modular Arithmetic 1 | 20 | |
| f1023n | XOR Starter | 10 | |
| handoko | Background Reading | 5 | |
| TheFlamingCrab | Bringing It All Together | 50 | |
| Cookies_ | Confusion through Substitution | 25 | |
| Cookies_ | Round Keys | 20 | |
| Ucandoit | Curves and Logs | 40 | |
| hello5263 | Extended GCD | 20 | |
| bobiealice | Greatest Common Divisor | 15 | |
| ahmadnaghibi | Modular Inverting | 25 | |
| Cookies_ | Structure of AES | 15 | |
| holsviktor | RSA or HMAC? Part 2 | 100 | |
| Sherpearce | Modular Square Root | 35 | |
| Kumber | Manyprime | 40 | |
| crypto_saka_hack | Curves and Logs | 40 | |
| Cookies_ | Resisting Bruteforce | 10 | |
| TheFlamingCrab | Diffusion through Permutation | 30 | |
| jarr | Base64 | 10 | |
| bobiealice | Lemur XOR | 40 | |
| Cookies_ | Keyed Permutations | 5 |
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