| Date | User | Challenge | Score |
| chefov | Network Attacks | 5 | |
| chefov | You either know, XOR you don't | 30 | |
| Ayhamodeh | Encoding Challenge | 40 | |
| pavlosp | Hash Stuffing | 50 | |
| chefov | Favourite byte | 20 | |
| chefov | XOR Properties | 15 | |
| Sagnik | Keyed Permutations | 5 | |
| chefov | XOR Starter | 10 | |
| chefov | Bytes and Big Integers | 10 | |
| mihaiDraghici | Confusion through Substitution | 25 | |
| acidlog | Manyprime | 40 | |
| chefov | Base64 | 10 | |
| chefov | Hex | 5 | |
| chefov | ASCII | 5 | |
| chefov | Great Snakes | 3 | |
| chefov | Finding Flags | 2 | |
| astroanax | Bounded Noise | 50 | |
| Namunamu | Marin's Secrets | 50 | |
| DhamoZx | XOR Properties | 15 | |
| pavlosp | Collider | 50 | |
| HarabagiuRobert | Legendre Symbol | 35 | |
| ptmee | Round Keys | 20 | |
| astroanax | From Private to Public Key LWE | 25 | |
| astroanax | LWE Low Bits Message | 20 | |
| mihaiDraghici | Round Keys | 20 | |
| pavlosp | Jack's Birthday Confusion | 30 | |
| Toretto_45 | Base64 | 10 | |
| astroanax | LWE High Bits Message | 15 | |
| Chervonw | Favourite byte | 20 | |
| whoiswhois | Oh SNAP | 120 | |
| SILENTR00T | You either know, XOR you don't | 30 | |
| humam5 | Hex | 5 | |
| SILENTR00T | Favourite byte | 20 | |
| benedictst | Double and Broken | 50 | |
| SILENTR00T | XOR Properties | 15 | |
| nmhuei | Let's Decrypt | 80 | |
| SILENTR00T | XOR Starter | 10 | |
| CubettoCubetto | Jack's Birthday Hash | 20 | |
| SILENTR00T | Bytes and Big Integers | 10 | |
| pavlosp | Jack's Birthday Hash | 20 | |
| fatfow64 | Hex | 5 | |
| SILENTR00T | Base64 | 10 | |
| Toretto_45 | Hex | 5 | |
| SILENTR00T | Hex | 5 | |
| ouias | Confusion through Substitution | 25 | |
| fjukh7872 | Fischlin Transform | 180 | |
| fjukh7872 | Fischlin's Transformation (CryptoHack) | 0 | |
| Acnologiarch | Bytes and Big Integers | 10 | |
| fatfow64 | ASCII | 5 | |
| SILENTR00T | ASCII | 5 |
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