| Date | User | Challenge | Score |
| JMC3 | Bytes and Big Integers | 10 | |
| fingopolo | Base64 | 10 | |
| jpisani86 | Great Snakes | 3 | |
| bogster | Quadratic Residues | 25 | |
| roogs22 | MD0 | 80 | |
| fingopolo | Hex | 5 | |
| mma | You either know, XOR you don't | 30 | |
| alphonso | Base64 | 10 | |
| fingopolo | ASCII | 5 | |
| alphonso | Hex | 5 | |
| alphonso | ASCII | 5 | |
| fingopolo | Great Snakes | 3 | |
| jpisani86 | Finding Flags | 2 | |
| mma | Favourite byte | 20 | |
| 25x8 | Favourite byte | 20 | |
| tancitizens1308 | XOR Starter | 10 | |
| L0in_y0ngc | Structure of AES | 15 | |
| bes | Background Reading | 5 | |
| fingopolo | Finding Flags | 2 | |
| MakarovKardevsky | Exceptional Curves | 100 | |
| Mwijukye_Chief_C | Export-grade | 100 | |
| Mwijukye_Chief_C | Parameter Injection | 60 | |
| Mwijukye_Chief_C | Deriving Symmetric Keys | 40 | |
| Mwijukye_Chief_C | Computing Shared Secrets | 30 | |
| baget | Favourite byte | 20 | |
| Mwijukye_Chief_C | Computing Public Values | 25 | |
| Mwijukye_Chief_C | Generators of Groups | 20 | |
| Mwijukye_Chief_C | Working with Fields | 10 | |
| Mwijukye_Chief_C | Modulus Inutilis | 50 | |
| Mwijukye_Chief_C | Salty | 20 | |
| Mwijukye_Chief_C | Manyprime | 40 | |
| Mwijukye_Chief_C | Monoprime | 30 | |
| Mwijukye_Chief_C | Factoring | 15 | |
| Mwijukye_Chief_C | RSA Signatures | 25 | |
| Mwijukye_Chief_C | RSA Decryption | 20 | |
| CipherPolZero | Favourite byte | 20 | |
| sharon223085 | ECB Oracle | 60 | |
| sharon223085 | Passwords as Keys | 50 | |
| Mwijukye_Chief_C | Private Keys | 20 | |
| sharon223085 | Modes of Operation Starter | 15 | |
| roogs22 | Long Story Short | 60 | |
| Mwijukye_Chief_C | Euler's Totient | 20 | |
| Mwijukye_Chief_C | Public Keys | 15 | |
| sharon223085 | Bringing It All Together | 50 | |
| Mwijukye_Chief_C | Modular Exponentiation | 10 | |
| sharon223085 | Diffusion through Permutation | 30 | |
| Thaimeo2006 | Gram Schmidt | 30 | |
| Samigo | ProSign 3 | 100 | |
| sharon223085 | Confusion through Substitution | 25 | |
| sharon223085 | Round Keys | 20 |
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