| Date | User | Challenge | Score |
| Math | Bytes and Big Integers | 10 | |
| Maciel_Leonardo | Great Snakes | 3 | |
| biaso | Base64 | 10 | |
| Maciel_Leonardo | Finding Flags | 2 | |
| amebazxc | Favourite byte | 20 | |
| hafo | Greatest Common Divisor | 15 | |
| Math | Base64 | 10 | |
| AGO83 | Quadratic Residues | 25 | |
| humoyun | XOR Starter | 10 | |
| hafo | You either know, XOR you don't | 30 | |
| hafo | Favourite byte | 20 | |
| hafo | XOR Properties | 15 | |
| Pravy | Round Keys | 20 | |
| Pravy | Structure of AES | 15 | |
| gittyasois | Chinese Remainder Theorem | 40 | |
| gittyasois | Modular Square Root | 35 | |
| Pravy | Resisting Bruteforce | 10 | |
| Pravy | Keyed Permutations | 5 | |
| nelson_nyambega | Deriving Symmetric Keys | 40 | |
| Math | Hex | 5 | |
| nelson_nyambega | Computing Shared Secrets | 30 | |
| chelinh | Modular Arithmetic 2 | 20 | |
| humoyun | Bytes and Big Integers | 10 | |
| amebazxc | XOR Properties | 15 | |
| nelson_nyambega | Generators of Groups | 20 | |
| nelson_nyambega | Working with Fields | 10 | |
| melodyofasong | You either know, XOR you don't | 30 | |
| nelson_nyambega | Modulus Inutilis | 50 | |
| nelson_nyambega | Salty | 20 | |
| pirt | Network Attacks | 5 | |
| pin3apple07 | Ellipse Curve Cryptography | 125 | |
| BRADLEY_JUMA | Export-grade | 100 | |
| BRADLEY_JUMA | Parameter Injection | 60 | |
| BRADLEY_JUMA | Deriving Symmetric Keys | 40 | |
| canaryda | ECB CBC WTF | 55 | |
| BRADLEY_JUMA | Computing Shared Secrets | 30 | |
| dirtyDeedz | Crossed Wires | 100 | |
| BRADLEY_JUMA | Computing Public Values | 25 | |
| pirt | Favourite byte | 20 | |
| nelson_nyambega | Manyprime | 40 | |
| BRADLEY_JUMA | Generators of Groups | 20 | |
| BRADLEY_JUMA | Working with Fields | 10 | |
| BRADLEY_JUMA | Modulus Inutilis | 50 | |
| BRADLEY_JUMA | Salty | 20 | |
| BRADLEY_JUMA | Manyprime | 40 | |
| BRADLEY_JUMA | Monoprime | 30 | |
| BRADLEY_JUMA | Factoring | 15 | |
| BRADLEY_JUMA | RSA Signatures | 25 | |
| nelson_nyambega | Monoprime | 30 | |
| BRADLEY_JUMA | RSA Decryption | 20 |
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