| Date | User | Challenge | Score |
| sigmaxi67 | Modular Arithmetic 1 | 20 | |
| Serge_Salcedo | Introduction to Isogenies | 10 | |
| Serge_Salcedo | Everything is Big | 70 | |
| xtea418 | Real Eisenstein | 150 | |
| xtea418 | No Way Back Home | 100 | |
| moozwen | Computing Shared Secrets | 30 | |
| Serge_Salcedo | Modulus Inutilis | 50 | |
| bonpepe | ECB CBC WTF | 55 | |
| Serge_Salcedo | Salty | 20 | |
| moozwen | Computing Public Values | 25 | |
| rafabarbeta | Special Soundness | 25 | |
| valentinb | Adrien's Signs | 80 | |
| Serge_Salcedo | Manyprime | 40 | |
| baselsadi | Bytes and Big Integers | 10 | |
| Grzechu420420 | ASCII | 5 | |
| cryptohackhaxk | Hex | 5 | |
| baselsadi | Base64 | 10 | |
| 2x2y2 | Beatboxer | 150 | |
| Grzechu420420 | Great Snakes | 3 | |
| cryptohackhaxk | ASCII | 5 | |
| Serge_Salcedo | Square Eyes | 35 | |
| grupo1csi | Hex | 5 | |
| radare | Vote for Pedro | 150 | |
| Arriccio | Too Many Errors | 100 | |
| Serge_Salcedo | Monoprime | 30 | |
| grupo1csi | ASCII | 5 | |
| Grzechu420420 | Finding Flags | 2 | |
| cryptohackhaxk | Great Snakes | 3 | |
| Noano2015 | Decrypting TLS 1.3 | 35 | |
| Kaldah | Background Reading | 5 | |
| AristotelisAnt | XOR Starter | 10 | |
| Noano2015 | Decrypting TLS 1.2 | 30 | |
| PanosKarap | Network Attacks | 5 | |
| PanosKarap | Great Snakes | 3 | |
| Noano2015 | Saying Hello | 20 | |
| YGUY | Confusion through Substitution | 25 | |
| PanosKarap | Finding Flags | 2 | |
| talayhan | An Evil Twisted Mind | 175 | |
| cryptohackhaxk | Finding Flags | 2 | |
| omar_mohamed | Modular Exponentiation | 10 | |
| Noano2015 | TLS Handshake | 15 | |
| Caracole | Adrien's Signs | 80 | |
| Erakinho | XOR Starter | 10 | |
| talayhan | An Exceptional Twisted Mind | 125 | |
| AristotelisAnt | Encoding Challenge | 40 | |
| Noano2015 | Sharks on the Wire | 10 | |
| sweatyrocket | LFSR Destroyer | 250 | |
| Noano2015 | Secure Protocols | 5 | |
| vsetti | Deriving Symmetric Keys | 40 | |
| demr | Deriving Symmetric Keys | 40 |
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