| Date | User | Challenge | Score |
| vessax | ECB CBC WTF | 55 | |
| vessax | ECB Oracle | 60 | |
| vessax | Passwords as Keys | 50 | |
| Noano2015 | Jack's Birthday Confusion | 30 | |
| Noano2015 | Jack's Birthday Hash | 20 | |
| NOXRe2 | Modular Square Root | 35 | |
| mszypere | The Matrix | 75 | |
| vessax | Modes of Operation Starter | 15 | |
| Maizar | Manyprime | 40 | |
| MaelTbr | Chinese Remainder Theorem | 40 | |
| 3amo_DA7Y | Finding Flags | 2 | |
| vessax | Bringing It All Together | 50 | |
| vessax | Diffusion through Permutation | 30 | |
| S3ld0m | Base64 | 10 | |
| MaelTbr | Modular Square Root | 35 | |
| vessax | Confusion through Substitution | 25 | |
| vessax | Round Keys | 20 | |
| vessax | Structure of AES | 15 | |
| vessax | Resisting Bruteforce | 10 | |
| vessax | Keyed Permutations | 5 | |
| Maizar | The Matrix Revolutions | 125 | |
| Allenallas | Modes of Operation Starter | 15 | |
| gapekos | Hex | 5 | |
| samiraawad | Greatest Common Divisor | 15 | |
| gapekos | ASCII | 5 | |
| Maizar | The Matrix Reloaded | 100 | |
| fezutacudija | Chinese Remainder Theorem | 40 | |
| fezutacudija | Modular Square Root | 35 | |
| Maizar | Static Client 2 | 120 | |
| Allenallas | Bringing It All Together | 50 | |
| seagul | Modular Arithmetic 2 | 20 | |
| M000riarty | ASCII | 5 | |
| gapekos | Great Snakes | 3 | |
| seagul | Modular Arithmetic 1 | 20 | |
| NOXRe2 | Legendre Symbol | 35 | |
| MidoS3d | Let's Decrypt | 80 | |
| valentinb | You either know, XOR you don't | 30 | |
| Assia_Kefil22 | You either know, XOR you don't | 30 | |
| gapekos | Finding Flags | 2 | |
| Maizar | Static Client | 100 | |
| siancec | Triple DES | 60 | |
| membeer | Base64 | 10 | |
| kadid | Lemur XOR | 40 | |
| nikaa | Extended GCD | 20 | |
| pazercastle | Finding Flags | 2 | |
| membeer | Hex | 5 | |
| Maizar | Export-grade | 100 | |
| kostpergan | Passwords as Keys | 50 | |
| kadid | You either know, XOR you don't | 30 | |
| nikaa | Greatest Common Divisor | 15 |
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