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Solved Challenges

Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Hash Functions Collider 50
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Smooth Criminal 60
Elliptic Curves Micro Transmissions 120
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Exceptional Curves 100
Elliptic Curves Montgomery's Ladder 40
Elliptic Curves Double and Broken 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Bringing It All Together 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Lemur XOR 40
Introduction Network Attacks 5
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
General Greatest Common Divisor 15
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
General Extended GCD 20
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General You either know, XOR you don't 30
General XOR Properties 15
General XOR Starter 10
RSA Square Eyes 35
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
General Favourite byte 20
General Encoding Challenge 40
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Introduction Great Snakes 3
Introduction Finding Flags 2
RSA Factoring 15
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Modular Exponentiation 10
RSA Euler's Totient 20
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5

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