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Level: 1
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| Lattices | LWE Background | 5 | |
| Lattices | Size and Basis | 15 | |
| Lattices | Vectors | 10 | |
| Crypto on the Web | JWT Sessions | 10 | |
| Crypto on the Web | Token Appreciation | 5 | |
| Hash Functions | Jack's Birthday Confusion | 30 | |
| Hash Functions | Jack's Birthday Hash | 20 | |
| Mathematics | Unencryptable | 125 | |
| Mathematics | Roll your Own | 125 | |
| Mathematics | Ellipse Curve Cryptography | 125 | |
| Mathematics | Modular Binomials | 80 | |
| Mathematics | Adrien's Signs | 80 | |
| Mathematics | Chinese Remainder Theorem | 40 | |
| Mathematics | Modular Square Root | 35 | |
| Mathematics | Legendre Symbol | 35 | |
| Mathematics | Quadratic Residues | 25 | |
| RSA | Let's Decrypt Again | 175 | |
| RSA | Vote for Pedro | 150 | |
| RSA | Signing Server | 60 | |
| RSA | Let's Decrypt | 80 | |
| RSA | Null or Never | 100 | |
| RSA | Bespoke Padding | 100 | |
| RSA | Marin's Secrets | 50 | |
| RSA | Endless Emails | 150 | |
| RSA | Everything is Big | 70 | |
| RSA | RSA Signatures | 25 | |
| RSA | RSA Backdoor Viability | 175 | |
| RSA | Ron was Wrong, Whit is Right | 90 | |
| RSA | Fast Primes | 75 | |
| RSA | Infinite Descent | 50 | |
| RSA | Crossed Wires | 100 | |
| RSA | Modulus Inutilis | 50 | |
| RSA | Salty | 20 | |
| Diffie-Hellman | Working with Fields | 10 | |
| Elliptic Curves | Point Negation | 10 | |
| Elliptic Curves | Background Reading | 5 | |
| Isogenies | Introduction to Isogenies | 10 | |
| RSA | Manyprime | 40 | |
| RSA | Square Eyes | 35 | |
| RSA | Monoprime | 30 | |
| RSA | Inferius Prime | 30 | |
| RSA | Factoring | 15 | |
| RSA | RSA Decryption | 20 | |
| RSA | Private Keys | 20 | |
| RSA | Euler's Totient | 20 | |
| RSA | Public Keys | 15 | |
| Symmetric Ciphers | ECB Oracle | 60 | |
| Symmetric Ciphers | Passwords as Keys | 50 | |
| Symmetric Ciphers | Modes of Operation Starter | 15 | |
| Symmetric Ciphers | Bringing It All Together | 50 | |
| Symmetric Ciphers | Diffusion through Permutation | 30 | |
| RSA | Modular Exponentiation | 10 | |
| Symmetric Ciphers | Resisting Bruteforce | 10 | |
| Symmetric Ciphers | Keyed Permutations | 5 | |
| General | Modular Inverting | 25 | |
| General | Modular Arithmetic 2 | 20 | |
| General | Modular Arithmetic 1 | 20 | |
| General | Extended GCD | 20 | |
| General | Greatest Common Divisor | 15 | |
| General | Lemur XOR | 40 | |
| General | Encoding Challenge | 40 | |
| Introduction | Network Attacks | 5 | |
| 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 | |
| Introduction | Great Snakes | 3 | |
| Introduction | Finding Flags | 2 |
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