| Date | User | Challenge | Score |
| AnantJain | Favourite byte | 20 | |
| thudbutt | Greatest Common Divisor | 15 | |
| kurumi_11 | ECB CBC WTF | 55 | |
| duckman_46 | XOR Properties | 15 | |
| AnantJain | XOR Properties | 15 | |
| tasnimibrahim728 | Finding Flags | 2 | |
| mohatem06 | Manyprime | 40 | |
| Omar_123KHattab | Point Negation | 10 | |
| siriusraven | Curves and Logs | 40 | |
| Omar_123KHattab | Background Reading | 5 | |
| D4rKSKar | XOR Starter | 10 | |
| thudbutt | You either know, XOR you don't | 30 | |
| Omar_123KHattab | RSA Decryption | 20 | |
| Janarthanan | You either know, XOR you don't | 30 | |
| HexSkadi | XOR Starter | 10 | |
| Omar_123KHattab | Private Keys | 20 | |
| Omar_123KHattab | Euler's Totient | 20 | |
| Omar_123KHattab | Public Keys | 15 | |
| siriusraven | Scalar Multiplication | 35 | |
| Omar_123KHattab | Modular Exponentiation | 10 | |
| tranchsanto | An Evil Twisted Mind | 175 | |
| Brissouille | RSA Signatures | 25 | |
| mohamed750boukh | You either know, XOR you don't | 30 | |
| kurumi_11 | ECB Oracle | 60 | |
| crypto_saka_hack | Sign in Please (HKCERT CTF) | 0 | |
| Omar_123KHattab | Structure of AES | 15 | |
| D4rKSKar | Bytes and Big Integers | 10 | |
| feynhat | Salty | 20 | |
| JCooker | XOR Starter | 10 | |
| hanahiennguyen | Gram Schmidt | 30 | |
| Stebin_S | Base64 | 10 | |
| Omar_123KHattab | Resisting Bruteforce | 10 | |
| JacobLu3141 | Symmetry | 50 | |
| Zirey | Finding Flags | 2 | |
| Omar_123KHattab | Keyed Permutations | 5 | |
| siriusraven | Point Addition | 30 | |
| Omar_123KHattab | Modular Arithmetic 1 | 20 | |
| hanahiennguyen | Size and Basis | 15 | |
| Omar_123KHattab | Extended GCD | 20 | |
| miiyen | Smooth Criminal | 60 | |
| hanahiennguyen | Vectors | 10 | |
| Chausse | XOR Properties | 15 | |
| fl4m4st3r | Chinese Remainder Theorem | 40 | |
| hanahiennguyen | JSON in JSON | 40 | |
| Koalko | Bean Counter | 60 | |
| MyWolve | Confusion through Substitution | 25 | |
| kenmarksix | Bytes and Big Integers | 10 | |
| JacobLu3141 | Lazy CBC | 60 | |
| Brissouille | RSA Decryption | 20 | |
| hoang1653 | CTRIME | 70 |
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