| Date | User | Challenge | Score |
| AlxGonin | ECB CBC WTF | 55 | |
| Eshwar_04 | Bytes and Big Integers | 10 | |
| kitchen_sink | Great Snakes | 3 | |
| artslan61 | Great Snakes | 3 | |
| NewShiv | XOR Properties | 15 | |
| Eshwar_04 | Point Addition | 30 | |
| VxRabbit | Diffusion through Permutation | 30 | |
| artslan61 | Finding Flags | 2 | |
| chahinaze | ASCII | 5 | |
| Eshwar_04 | Point Negation | 10 | |
| Eshwar_04 | Background Reading | 5 | |
| Krentium | Base64 | 10 | |
| fmakulsk | Bytes and Big Integers | 10 | |
| 1s0m0rph1sm | Common Ground | 75 | |
| vo_ided_01 | Modular Arithmetic 2 | 20 | |
| Doyota | You either know, XOR you don't | 30 | |
| Cosmin | Modular Arithmetic 1 | 20 | |
| 0hexor | You either know, XOR you don't | 30 | |
| chahinaze | Great Snakes | 3 | |
| maksushka | Backpack Cryptography | 120 | |
| Doyota | XOR Starter | 10 | |
| Cosmin | Extended GCD | 20 | |
| SimonRada | RSA Signatures | 25 | |
| mzz | Bean Counter | 60 | |
| wiee | Base64 | 10 | |
| Konung_of_Larp | Diffusion through Permutation | 30 | |
| SimonRada | RSA Decryption | 20 | |
| chahinaze | Finding Flags | 2 | |
| HumanHumanName | Passwords as Keys | 50 | |
| CrankyPants | Monoprime | 30 | |
| SimonRada | Private Keys | 20 | |
| SimonRada | Euler's Totient | 20 | |
| SimonRada | Public Keys | 15 | |
| 0hexor | Favourite byte | 20 | |
| SimonRada | Modular Exponentiation | 10 | |
| 0hexor | XOR Properties | 15 | |
| wiee | Hex | 5 | |
| RIAO124 | Great Snakes | 3 | |
| wiee | ASCII | 5 | |
| Amro_Hussein | Let's Decrypt Again | 175 | |
| CrankyPants | Factoring | 15 | |
| Romyna | Rhetorical Oracle | 100 | |
| RIAO124 | Finding Flags | 2 | |
| wiee | Great Snakes | 3 | |
| BrainerChampion | Diffusion through Permutation | 30 | |
| openthedoor | Finding Flags | 2 | |
| unixkarma | Favourite byte | 20 | |
| Konung_of_Larp | Confusion through Substitution | 25 | |
| Cosmin | Greatest Common Divisor | 15 | |
| amibios | Finding Flags | 2 |
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