| Date | User | Challenge | Score |
| Closer344 | Resisting Bruteforce | 10 | |
| forge | Pad Thai | 80 | |
| Guilherme99ss | Great Snakes | 3 | |
| Closer344 | Keyed Permutations | 5 | |
| vishg7 | Base64 | 10 | |
| OYJ | Finding Flags | 2 | |
| sakiteuy | No Leaks | 100 | |
| Kran | Export-grade | 100 | |
| Dendy | Chinese Remainder Theorem | 40 | |
| Drakonvol | Extended GCD | 20 | |
| vishg7 | Hex | 5 | |
| forge | Oh SNAP | 120 | |
| Guilherme99ss | Finding Flags | 2 | |
| eb238 | Bringing It All Together | 50 | |
| megaduck | Modular Arithmetic 1 | 20 | |
| eb238 | Diffusion through Permutation | 30 | |
| eb238 | Confusion through Substitution | 25 | |
| NoBirdWasHam | Jeff's LFSR | 150 | |
| NoBirdWasHam | No Random, No Bias | 120 | |
| zoraque | Network Attacks | 5 | |
| Ambazinia | Base64 | 10 | |
| 4n4l1st | ASCII | 5 | |
| eb238 | Round Keys | 20 | |
| KryptoUser | Square Eyes | 35 | |
| bobesoun | ASCII | 5 | |
| NoBirdWasHam | Lo-Hi Card Game | 120 | |
| Drakonvol | Greatest Common Divisor | 15 | |
| KryptoUser | Monoprime | 30 | |
| thymoney35 | You either know, XOR you don't | 30 | |
| eb238 | Structure of AES | 15 | |
| Kenshin | XOR Properties | 15 | |
| jozbruer | ASCII | 5 | |
| eb238 | Resisting Bruteforce | 10 | |
| 4n4l1st | Great Snakes | 3 | |
| vishg7 | ASCII | 5 | |
| 4n4l1st | Finding Flags | 2 | |
| eb238 | Keyed Permutations | 5 | |
| bobesoun | Great Snakes | 3 | |
| vishg7 | Great Snakes | 3 | |
| Kenshin | XOR Starter | 10 | |
| NoBirdWasHam | Nothing Up My Sleeve | 150 | |
| vishg7 | Finding Flags | 2 | |
| bobesoun | Finding Flags | 2 | |
| KryptoUser | Inferius Prime | 30 | |
| megaduck | Extended GCD | 20 | |
| Kenshin | Bytes and Big Integers | 10 | |
| Kran | Parameter Injection | 60 | |
| ParkJuHeon | Bytes and Big Integers | 10 | |
| _Midnight_ | You either know, XOR you don't | 30 | |
| KryptoUser | Factoring | 15 |
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