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| Hash Functions | Merkle Trees | 25 | |
| Hash Functions | Mixed Up | 120 | |
| Hash Functions | No Difference | 175 | |
| Hash Functions | Twin Keys | 100 | |
| Hash Functions | WOTS Up | 75 | |
| Hash Functions | MD0 | 80 | |
| Hash Functions | PriMeD5 | 100 | |
| Hash Functions | Hash Stuffing | 50 | |
| Hash Functions | Collider | 50 | |
| Hash Functions | Jack's Birthday Confusion | 30 | |
| Hash Functions | Jack's Birthday Hash | 20 | |
| Diffie-Hellman | Script Kiddie | 70 | |
| Diffie-Hellman | Static Client 2 | 120 | |
| Diffie-Hellman | Additive | 70 | |
| Diffie-Hellman | Static Client | 100 | |
| Diffie-Hellman | Export-grade | 100 | |
| Diffie-Hellman | Parameter Injection | 60 | |
| Diffie-Hellman | Deriving Symmetric Keys | 40 | |
| Diffie-Hellman | Computing Shared Secrets | 30 | |
| Diffie-Hellman | Computing Public Values | 25 | |
| Diffie-Hellman | Generators of Groups | 20 | |
| Diffie-Hellman | Working with Fields | 10 | |
| Mathematics | Cofactor Cofantasy | 150 | |
| Mathematics | Unencryptable | 125 | |
| Mathematics | Roll your Own | 125 | |
| Mathematics | No Way Back Home | 100 | |
| Mathematics | Broken RSA | 100 | |
| Mathematics | Modular Binomials | 80 | |
| Mathematics | Adrien's Signs | 80 | |
| Mathematics | Successive Powers | 60 | |
| Mathematics | Chinese Remainder Theorem | 40 | |
| Mathematics | Modular Square Root | 35 | |
| Mathematics | Legendre Symbol | 35 | |
| Mathematics | Quadratic Residues | 25 | |
| General | Encoding Challenge | 40 | |
| General | SSH Keys | 35 | |
| General | CERTainly not | 30 | |
| General | Privacy-Enhanced Mail? | 25 | |
| General | Modular Inverting | 25 | |
| General | Modular Arithmetic 2 | 20 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Extended GCD | 20 | |
| General | Greatest Common Divisor | 15 | |
| General | You either know, XOR you don't | 30 | |
| General | Favourite byte | 20 | |
| General | XOR Properties | 15 | |
| General | XOR Starter | 10 | |
| General | Bytes and Big Integers | 10 | |
| General | Base64 | 10 | |
| General | Hex | 5 | |
| General | ASCII | 5 |
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