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Solved Challenges

Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Round Keys 20
Mathematics Prime and Prejudice 200
Mathematics Real Eisenstein 150
Mathematics Roll your Own 125
Mathematics No Way Back Home 100
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
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
Mathematics Unencryptable 125
Mathematics Broken RSA 100
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Successive Powers 60
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Chinese Remainder Theorem 40
General SSH Keys 35
General Transparency 50
General CERTainly not 30
General Encoding Challenge 40
Diffie-Hellman Working with Fields 10
General Lemur XOR 40
Mathematics Quadratic Residues 25
RSA RSA Backdoor Viability 175
RSA Ron was Wrong, Whit is Right 90
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Endless Emails 150
RSA RSA Signatures 25
RSA Null or Never 100
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
Introduction Network Attacks 5
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
General Greatest Common Divisor 15
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
RSA Modular Exponentiation 10
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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