| Date | User | Challenge | Score |
| Kirkos | Favourite byte | 20 | |
| Mr_Togoo | Hex | 5 | |
| At0mxploit | You either know, XOR you don't | 30 | |
| agilghif | Quadratic Residues | 25 | |
| Mr_Togoo | ASCII | 5 | |
| Kirkos | XOR Properties | 15 | |
| suuze | Hex | 5 | |
| madhav_anand_ | Beatboxer | 150 | |
| IbaiRdA | You either know, XOR you don't | 30 | |
| suuze | ASCII | 5 | |
| At0mxploit | Favourite byte | 20 | |
| naruna | Finding Flags | 2 | |
| suuze | Great Snakes | 3 | |
| Kirkos | XOR Starter | 10 | |
| suuze | Finding Flags | 2 | |
| Mr_Togoo | Great Snakes | 3 | |
| ExEngr | ASCII | 5 | |
| sewulas | Export-grade | 100 | |
| At0mxploit | XOR Properties | 15 | |
| Afaf | Unencryptable | 125 | |
| Kirkos | Bytes and Big Integers | 10 | |
| ExEngr | Network Attacks | 5 | |
| h0ney | Encoding Challenge | 40 | |
| Saltensity | Diffusion through Permutation | 30 | |
| Afaf | Roll your Own | 125 | |
| huunhan2004 | Background Reading | 5 | |
| ciphermalware | CSIDH Key Exchange | 90 | |
| ciphermalware | Twisted CSIDH Isogenies | 70 | |
| ciphermalware | Secret Exponents | 60 | |
| zebec | Bytes and Big Integers | 10 | |
| ciphermalware | Prime Power Isogenies | 50 | |
| ciphermalware | Special Isogenies | 30 | |
| vinnyuri | Favourite byte | 20 | |
| LePcASofia | Diffusion through Permutation | 30 | |
| Baeco | Generators of Groups | 20 | |
| Baeco | Working with Fields | 10 | |
| Niharika | ASCII | 5 | |
| sewulas | Script Kiddie | 70 | |
| Afaf | Ellipse Curve Cryptography | 125 | |
| Saltensity | Confusion through Substitution | 25 | |
| ru1es | You either know, XOR you don't | 30 | |
| Showkara | Pairing-Based Cryptography | 50 | |
| eagrianiti | Exceptional Curves | 100 | |
| IbaiRdA | Favourite byte | 20 | |
| LePcASofia | Confusion through Substitution | 25 | |
| Afaf | No Way Back Home | 100 | |
| Afaf | Broken RSA | 100 | |
| Saltensity | Round Keys | 20 | |
| viflaem2 | Moving Problems | 150 | |
| ru1es | Favourite byte | 20 |
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