| Date | User | Challenge | Score |
| sutterismine | Keyed Permutations | 5 | |
| KostasDm05 | Crossed Wires | 100 | |
| BaBYBu11 | Monoprime | 30 | |
| brunolim4 | Micro Transmissions | 120 | |
| AryanChidumalla | Modular Arithmetic 1 | 20 | |
| 2uerti | You either know, XOR you don't | 30 | |
| ASN_123 | Bytes and Big Integers | 10 | |
| sivarin | You either know, XOR you don't | 30 | |
| gh0stvageo | Deriving Symmetric Keys | 40 | |
| BaBYBu11 | Inferius Prime | 30 | |
| AryanChidumalla | Extended GCD | 20 | |
| ymoe3 | Greatest Common Divisor | 15 | |
| Omnivorem | Great Snakes | 3 | |
| KostasDm05 | Everything is Big | 70 | |
| gh0stvageo | Modes of Operation Starter | 15 | |
| oGAD_ | CERTainly not | 30 | |
| ymoe3 | Lemur XOR | 40 | |
| AryanChidumalla | Greatest Common Divisor | 15 | |
| semisweetdude | You either know, XOR you don't | 30 | |
| W1nd5h13ldV1p3r | Modular Arithmetic 2 | 20 | |
| ninalty_dev | Parameter Injection | 60 | |
| sivarin | Favourite byte | 20 | |
| ispo | Efficient Exchange | 50 | |
| sivarin | XOR Properties | 15 | |
| ymoe3 | You either know, XOR you don't | 30 | |
| eciid | XOR Starter | 10 | |
| sivarin | XOR Starter | 10 | |
| sivarin | Bytes and Big Integers | 10 | |
| eciid | Bytes and Big Integers | 10 | |
| devan | Moving Problems | 150 | |
| stamatia_psalti | RSA Decryption | 20 | |
| KostasDm05 | Modulus Inutilis | 50 | |
| 0x00696e6964756f | Jack's Birthday Confusion | 30 | |
| W1nd5h13ldV1p3r | Modular Arithmetic 1 | 20 | |
| eciid | Base64 | 10 | |
| W1nd5h13ldV1p3r | Extended GCD | 20 | |
| eciid | Hex | 5 | |
| oGAD_ | Privacy-Enhanced Mail? | 25 | |
| The_Pug | Modular Arithmetic 2 | 20 | |
| Bosseat | Finding Flags | 2 | |
| KostasDm05 | Salty | 20 | |
| ispo | Curves and Logs | 40 | |
| sivarin | Base64 | 10 | |
| AmirWayne | Bytes and Big Integers | 10 | |
| PanneerDosa | Modular Inverting | 25 | |
| y0dam4n | Factoring | 15 | |
| KostasDm05 | Euler's Totient | 20 | |
| mar_ven | Parameter Injection | 60 | |
| ispo | Scalar Multiplication | 35 | |
| mar_ven | Deriving Symmetric Keys | 40 |
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