| Date | User | Challenge | Score |
| JoH86 | Bytes and Big Integers | 10 | |
| rafia_barsha | XOR Starter | 10 | |
| rafia_barsha | Bytes and Big Integers | 10 | |
| rafia_barsha | Base64 | 10 | |
| A2RU | Toshi's Treasure | 150 | |
| A2RU | Armory | 100 | |
| talbalak | Monoprime | 30 | |
| cryptohack720 | Quadratic Residues | 25 | |
| EvelynMaria | Hex | 5 | |
| yrighting | Modular Inverting | 25 | |
| hasuke | Curves and Logs | 40 | |
| TheGoose55 | Greatest Common Divisor | 15 | |
| rafia_barsha | Hex | 5 | |
| EvelynMaria | ASCII | 5 | |
| MukaMuahaha | Greatest Common Divisor | 15 | |
| KusaYu | Modes of Operation Starter | 15 | |
| EvelynMaria | Great Snakes | 3 | |
| kira07 | Gram Schmidt | 30 | |
| lid | Gotta Go Fast | 40 | |
| EvelynMaria | Finding Flags | 2 | |
| TheGoose55 | Keyed Permutations | 5 | |
| AT42110 | Deriving Symmetric Keys | 40 | |
| cryptohack720 | Modular Inverting | 25 | |
| KusaYu | Bringing It All Together | 50 | |
| ktsoupos | ECB CBC WTF | 55 | |
| cryptohack720 | Modular Arithmetic 2 | 20 | |
| jaeu1341 | Flipping Cookie | 60 | |
| skylers | Square Eyes | 35 | |
| Paballo | XOR Properties | 15 | |
| Sharmila_Alam | You either know, XOR you don't | 30 | |
| henril | RSA Signatures | 25 | |
| rafia_barsha | ASCII | 5 | |
| Alizadeh | XOR Starter | 10 | |
| rafia_barsha | Great Snakes | 3 | |
| cryptohack720 | Modular Arithmetic 1 | 20 | |
| LTaki | Logon Zero | 80 | |
| AT42110 | Computing Shared Secrets | 30 | |
| Musrat_Jahan | Base64 | 10 | |
| rafia_barsha | Finding Flags | 2 | |
| cryptohack720 | Extended GCD | 20 | |
| jaeu1341 | ECB Oracle | 60 | |
| Dextox | Base64 | 10 | |
| Sharmila_Alam | Favourite byte | 20 | |
| ktsoupos | ECB Oracle | 60 | |
| Sharmila_Alam | XOR Properties | 15 | |
| skylers | Monoprime | 30 | |
| Sharmila_Alam | XOR Starter | 10 | |
| TheGoose55 | You either know, XOR you don't | 30 | |
| cplex | You either know, XOR you don't | 30 | |
| AT42110 | Computing Public Values | 25 |
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