| Date | User | Challenge | Score |
| fbox | XOR Starter | 10 | |
| marthaha | Round Keys | 20 | |
| ngynmq | No Way Back Home | 100 | |
| rahilabbasli | Finding Flags | 2 | |
| karsar11 | Ellipse Curve Cryptography | 125 | |
| Djak0 | CERTainly not | 30 | |
| polhan | Deriving Symmetric Keys | 40 | |
| polhan | Computing Shared Secrets | 30 | |
| whiteknight | Hash Stuffing | 50 | |
| polhan | Computing Public Values | 25 | |
| Djak0 | Privacy-Enhanced Mail? | 25 | |
| polhan | Generators of Groups | 20 | |
| marthaha | Structure of AES | 15 | |
| 25520221 | RSA Signatures | 25 | |
| Oberon | Where's the Supersingular Curve | 25 | |
| BlueAsFIre | XOR Properties | 15 | |
| marthaha | Resisting Bruteforce | 10 | |
| mh474 | WOTS Up 2 | 90 | |
| 2aviv20 | Base64 | 10 | |
| Arpan0x88 | You either know, XOR you don't | 30 | |
| marthaha | Keyed Permutations | 5 | |
| Arpan0x88 | Favourite byte | 20 | |
| Chenskie | Let's Decrypt Again | 175 | |
| Chenskie | Vote for Pedro | 150 | |
| Chenskie | Blinding Light | 120 | |
| Chenskie | Let's Decrypt | 80 | |
| Chenskie | Signing Server | 60 | |
| Chenskie | Null or Never | 100 | |
| Chenskie | Bespoke Padding | 100 | |
| polhan | Working with Fields | 10 | |
| Chenskie | RSA Backdoor Viability | 175 | |
| Chenskie | Ron was Wrong, Whit is Right | 90 | |
| Chenskie | Fast Primes | 75 | |
| Chenskie | Marin's Secrets | 50 | |
| Chenskie | Infinite Descent | 50 | |
| Chenskie | Endless Emails | 150 | |
| Chenskie | Everything is Still Big | 100 | |
| Chenskie | Crossed Wires | 100 | |
| Chenskie | Everything is Big | 70 | |
| polhan | Modulus Inutilis | 50 | |
| Chenskie | Modulus Inutilis | 50 | |
| 25520221 | RSA Decryption | 20 | |
| SeifAhmed | RSA vs RNG | 150 | |
| Chenskie | Salty | 20 | |
| Oberon | The j-invariant | 20 | |
| Arpan0x88 | XOR Properties | 15 | |
| tui101 | Confusion through Substitution | 25 | |
| mh474 | WOTS Up | 75 | |
| ngynmq | Successive Powers | 60 | |
| Ysalama | Jack's Birthday Confusion | 30 |
You are now level Current level