| Date | User | Challenge | Score |
| IlyShaayaya | Resisting Bruteforce | 10 | |
| IlyShaayaya | Keyed Permutations | 5 | |
| Aeryth | XOR Properties | 15 | |
| ynwa_ | Greatest Common Divisor | 15 | |
| Mukeshburdak | Round Keys | 20 | |
| IlyShaayaya | Bytes and Big Integers | 10 | |
| userdead | Broken RSA | 100 | |
| IlyShaayaya | Base64 | 10 | |
| userdead | Modular Binomials | 80 | |
| Mukeshburdak | Structure of AES | 15 | |
| userdead | Adrien's Signs | 80 | |
| mr_owl | ASCII | 5 | |
| ynwa_ | You either know, XOR you don't | 30 | |
| IlyShaayaya | Hex | 5 | |
| Mukeshburdak | Resisting Bruteforce | 10 | |
| Mukeshburdak | Keyed Permutations | 5 | |
| Luizinnz | Bytes and Big Integers | 10 | |
| Luizinnz | Base64 | 10 | |
| userdead | Successive Powers | 60 | |
| wh77 | Transparency | 50 | |
| userdead | Chinese Remainder Theorem | 40 | |
| IlyShaayaya | ASCII | 5 | |
| userdead | Modular Square Root | 35 | |
| IlyShaayaya | Great Snakes | 3 | |
| ZhangJing | ASCII | 5 | |
| userdead | Legendre Symbol | 35 | |
| ZhangJing | Great Snakes | 3 | |
| userdead | Quadratic Residues | 25 | |
| Seifaldin | ASCII | 5 | |
| ynwa_ | Favourite byte | 20 | |
| Seifaldin | Great Snakes | 3 | |
| ZhangJing | Finding Flags | 2 | |
| Sygon_Kk08 | Favourite byte | 20 | |
| ynwa_ | XOR Properties | 15 | |
| Seifaldin | Finding Flags | 2 | |
| honor2016tw | Bringing It All Together | 50 | |
| ynwa_ | XOR Starter | 10 | |
| ynwa_ | Bytes and Big Integers | 10 | |
| mohammedalshalab | Network Attacks | 5 | |
| wh77 | SSH Keys | 35 | |
| ynwa_ | Base64 | 10 | |
| mohammedalshalab | WOTS Up 2 | 90 | |
| mohammedalshalab | WOTS Up | 75 | |
| mohammedalshalab | Merkle Trees | 25 | |
| mohammedalshalab | Invariant | 250 | |
| mohammedalshalab | Mixed Up | 120 | |
| mohammedalshalab | MDFlag | 125 | |
| penguinpenguinpe | Structure of AES | 15 | |
| ynwa_ | Hex | 5 | |
| mohammedalshalab | MD0 | 80 |
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