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Solved Challenges

General Transparency 50
Symmetric Ciphers Modes of Operation Starter 15
Mathematics Modular Binomials 80
Mathematics Successive Powers 60
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
General You either know, XOR you don't 30
General Favourite byte 20
General Encoding Challenge 40
Lattices Gaussian Reduction 50
General Lemur XOR 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
General SSH Keys 35
Elliptic Curves Point Negation 10
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Elliptic Curves Background Reading 5
Diffie-Hellman Working with Fields 10
RSA Factoring 15
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Mathematics Modular Square Root 35
Lattices What's a Lattice? 40
Symmetric Ciphers Keyed Permutations 5
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 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 XOR Properties 15
General XOR Starter 10
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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