| Date | User | Challenge | Score |
| may123 | ASCII | 5 | |
| may123 | Great Snakes | 3 | |
| mogambo | XOR Properties | 15 | |
| rwxerwx | Extended GCD | 20 | |
| IcingMoon | Rhetorical Oracle 2 | 150 | |
| kimjiwon | Round Keys | 20 | |
| fantom | Modular Inverting | 25 | |
| mej | RSA Signatures | 25 | |
| esanta01 | Passwords as Keys | 50 | |
| IcingMoon | Rhetorical Oracle | 100 | |
| NeIsenn | Chinese Remainder Theorem | 40 | |
| kalawasp | Great Snakes | 3 | |
| Doanhdz | Network Attacks | 5 | |
| IcingMoon | Bad Temper | 130 | |
| IcingMoon | Bad Temper 2 | 150 | |
| may123 | Finding Flags | 2 | |
| jaminburns | Bean Counter | 60 | |
| jaminburns | Symmetry | 50 | |
| jaminburns | Flipping Cookie | 60 | |
| jaminburns | ECB CBC WTF | 55 | |
| esanta01 | Modes of Operation Starter | 15 | |
| IcingMoon | Long Story Short | 60 | |
| jaminburns | ECB Oracle | 60 | |
| jaminburns | Passwords as Keys | 50 | |
| IcingMoon | Seventy-Two | 50 | |
| jaminburns | Modes of Operation Starter | 15 | |
| jaminburns | Bringing It All Together | 50 | |
| jaminburns | Diffusion through Permutation | 30 | |
| jaminburns | Confusion through Substitution | 25 | |
| jaminburns | Round Keys | 20 | |
| jaminburns | Structure of AES | 15 | |
| jaminburns | Resisting Bruteforce | 10 | |
| jaminburns | Keyed Permutations | 5 | |
| eureka | Favourite byte | 20 | |
| rwxerwx | Greatest Common Divisor | 15 | |
| IcingMoon | Common Ground | 75 | |
| kimjiwon | Structure of AES | 15 | |
| RussianBotanist | You either know, XOR you don't | 30 | |
| pseudostate | RSA Signatures | 25 | |
| sum8ul | ASCII | 5 | |
| rinta | Modular Arithmetic 1 | 20 | |
| sakiteuy | RSA vs RNG | 150 | |
| dypoal | Hex | 5 | |
| sum8ul | Great Snakes | 3 | |
| sum8ul | Finding Flags | 2 | |
| Hackologist | XOR Starter | 10 | |
| j02374197 | Flipping Cookie | 60 | |
| j02374197 | ECB CBC WTF | 55 | |
| kelejichi | Scalar Multiplication | 35 | |
| j02374197 | ECB Oracle | 60 |
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