| Date | User | Challenge | Score |
| lunkes | Bytes and Big Integers | 10 | |
| wiener1 | Real Eisenstein | 150 | |
| 010001000101001 | Modulus Inutilis | 50 | |
| JoniLyomila | Finding Flags | 2 | |
| lunkes | Base64 | 10 | |
| tyluudinh | Bringing It All Together | 50 | |
| tyluudinh | Diffusion through Permutation | 30 | |
| tyluudinh | Confusion through Substitution | 25 | |
| tyluudinh | Round Keys | 20 | |
| tyluudinh | Structure of AES | 15 | |
| tyluudinh | Resisting Bruteforce | 10 | |
| wiener1 | Cofactor Cofantasy | 150 | |
| adrianps93 | Factoring | 15 | |
| tyluudinh | Keyed Permutations | 5 | |
| tyluudinh | Passwords as Keys | 50 | |
| tyluudinh | Modes of Operation Starter | 15 | |
| 010001000101001 | Salty | 20 | |
| salut | Base64 | 10 | |
| adrianps93 | RSA Decryption | 20 | |
| 010001000101001 | Manyprime | 40 | |
| tyluudinh | Encoding Challenge | 40 | |
| mohatem06 | RSA Decryption | 20 | |
| ak9416 | ASCII | 5 | |
| demr | Script Kiddie | 70 | |
| g4dZ0r | Monoprime | 30 | |
| mohatem06 | Private Keys | 20 | |
| tyluudinh | Transparency | 50 | |
| tyluudinh | Lemur XOR | 40 | |
| tyluudinh | You either know, XOR you don't | 30 | |
| tyluudinh | Favourite byte | 20 | |
| tyluudinh | XOR Properties | 15 | |
| tyluudinh | XOR Starter | 10 | |
| tyluudinh | Base64 | 10 | |
| manumuffin | XOR Starter | 10 | |
| wiener1 | Unencryptable | 125 | |
| tyluudinh | SSH Keys | 35 | |
| tyluudinh | CERTainly not | 30 | |
| tyluudinh | Privacy-Enhanced Mail? | 25 | |
| tyluudinh | Bytes and Big Integers | 10 | |
| tyluudinh | Hex | 5 | |
| tyluudinh | ASCII | 5 | |
| tyluudinh | Modular Inverting | 25 | |
| tyluudinh | Modular Arithmetic 2 | 20 | |
| tyluudinh | Modular Arithmetic 1 | 20 | |
| tyluudinh | Extended GCD | 20 | |
| tyluudinh | Greatest Common Divisor | 15 | |
| wiener1 | Roll your Own | 125 | |
| adrianps93 | Private Keys | 20 | |
| d4rkwh15k3r5 | XOR Starter | 10 | |
| wiener1 | Ellipse Curve Cryptography | 125 |
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