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Solved Challenges

Lattices Gram Schmidt 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Diffusion through Permutation 30
Diffie-Hellman Deriving Symmetric Keys 40
Mathematics Modular Square Root 35
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Generators of Groups 20
RSA Factoring 15
General Favourite byte 20
Lattices Gaussian Reduction 50
Crypto on the Web Secure Protocols 5
Mathematics Legendre Symbol 35
RSA RSA Decryption 20
Diffie-Hellman Computing Public Values 25
Mathematics Chinese Remainder Theorem 40
Crypto on the Web JWT Sessions 10
RSA Private Keys 20
Elliptic Curves Background Reading 5
Lattices LWE Background 5
General Modular Inverting 25
Diffie-Hellman Working with Fields 10
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Lattices What's a Lattice? 40
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Quadratic Residues 25
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
General XOR Properties 15
Introduction Network Attacks 5
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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