| Date | User | Challenge | Score |
| 0xSonic | Endless Emails | 150 | |
| GeorgeSor | Jack's Birthday Hash | 20 | |
| ck0d | Adrien's Signs | 80 | |
| labronvargas | Finding Flags | 2 | |
| ck0d | Chinese Remainder Theorem | 40 | |
| s24035 | Base64 | 10 | |
| s24035 | Hex | 5 | |
| flapjack990 | Chinese Remainder Theorem | 40 | |
| s24035 | ASCII | 5 | |
| s24035 | Great Snakes | 3 | |
| s24035 | Finding Flags | 2 | |
| GeorgeSor | Encoding Challenge | 40 | |
| ggerod | Scalar Multiplication | 35 | |
| ck0d | Modular Square Root | 35 | |
| asma_fth | ASCII | 5 | |
| asma_fth | Great Snakes | 3 | |
| osan | CERTainly not | 30 | |
| asma_fth | Finding Flags | 2 | |
| ggerod | Point Addition | 30 | |
| Princia | Base64 | 10 | |
| leatherface | Keyed Permutations | 5 | |
| GeorgeSor | Network Attacks | 5 | |
| flower2 | Factoring | 15 | |
| JustAnother1 | Hex | 5 | |
| tomjab | Modular Binomials | 80 | |
| Noah6002 | You either know, XOR you don't | 30 | |
| Serenity | Hash Stuffing | 50 | |
| Noah6002 | Favourite byte | 20 | |
| Noah6002 | XOR Properties | 15 | |
| PanagiotaTr | Greatest Common Divisor | 15 | |
| flower2 | Lemur XOR | 40 | |
| Noah6002 | XOR Starter | 10 | |
| Noah6002 | Bytes and Big Integers | 10 | |
| ryougi_shiki | Decrypting TLS 1.2 | 30 | |
| Noah6002 | Base64 | 10 | |
| tomjab | Transparency | 50 | |
| Noah6002 | Hex | 5 | |
| Noah6002 | ASCII | 5 | |
| CyberSyndrome | Favourite byte | 20 | |
| Noah6002 | Great Snakes | 3 | |
| Noah6002 | Finding Flags | 2 | |
| tomjab | SSH Keys | 35 | |
| keydownmonkey | You either know, XOR you don't | 30 | |
| Wazaray | Base64 | 10 | |
| flower2 | You either know, XOR you don't | 30 | |
| tomjab | CERTainly not | 30 | |
| Princia | Hex | 5 | |
| tomjab | Privacy-Enhanced Mail? | 25 | |
| Wazaray | Hex | 5 | |
| tomjab | Lemur XOR | 40 |
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