| Date | User | Challenge | Score |
| Scam | Modular Arithmetic 1 | 20 | |
| kurgan | Structure of AES | 15 | |
| Scam | Extended GCD | 20 | |
| hngtr969 | Base64 | 10 | |
| aalq_3 | Greatest Common Divisor | 15 | |
| yuri981 | Modular Arithmetic 1 | 20 | |
| Ter3Sni | RSA Signatures | 25 | |
| hngtr969 | Hex | 5 | |
| Mat_ | Encoding Challenge | 40 | |
| Sharan07 | Finding Flags | 2 | |
| Noe2010 | Base64 | 10 | |
| emadig4 | Working with Fields | 10 | |
| s24f14 | Greatest Common Divisor | 15 | |
| emadig4 | Modulus Inutilis | 50 | |
| s24f14 | XOR Starter | 10 | |
| JunhyeongShin | Flipping Cookie | 60 | |
| zzae | Modes of Operation Starter | 15 | |
| Scam | Greatest Common Divisor | 15 | |
| Zastrow | Jack's Birthday Confusion | 30 | |
| Zastrow | Jack's Birthday Hash | 20 | |
| kurgan | Resisting Bruteforce | 10 | |
| PriyanshuPansari | ECB CBC WTF | 55 | |
| sdigs | Confusion through Substitution | 25 | |
| b4orvn | Finding Flags | 2 | |
| zzae | Bringing It All Together | 50 | |
| AssEaterPro | Hash Stuffing | 50 | |
| dharsan_0x1 | Finding Flags | 2 | |
| NathanHau0124 | Bytes and Big Integers | 10 | |
| Withered_ | Bytes and Big Integers | 10 | |
| s24f14 | ASCII | 5 | |
| s24f14 | Bytes and Big Integers | 10 | |
| emadig4 | Salty | 20 | |
| hngtr969 | ASCII | 5 | |
| JunhyeongShin | ECB Oracle | 60 | |
| emotionaldamage4 | Bytes and Big Integers | 10 | |
| hngtr969 | Great Snakes | 3 | |
| NathanHau0124 | Base64 | 10 | |
| hngtr969 | Finding Flags | 2 | |
| kurgan | Keyed Permutations | 5 | |
| khanhlm091 | ECB Oracle | 60 | |
| NathanHau0124 | Hex | 5 | |
| emadig4 | Manyprime | 40 | |
| NathanHau0124 | ASCII | 5 | |
| s24f14 | Hex | 5 | |
| wylited | Bytes and Big Integers | 10 | |
| JunhyeongShin | ECB CBC WTF | 55 | |
| Hayes | Base64 | 10 | |
| HarryBOB | Quadratic Residues | 25 | |
| TheKY | RSA Decryption | 20 | |
| PIkapikaHei | Bytes and Big Integers | 10 |
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