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Solved Challenges

Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Working with Fields 10
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Symmetric Ciphers Symmetry 50
Symmetric Ciphers ECB CBC WTF 55
Mathematics Quadratic Residues 25
RSA Salty 20
RSA Manyprime 40
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB Oracle 60
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Modes of Operation Starter 15
General CERTainly not 30
General SSH Keys 35
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
RSA Modular Exponentiation 10
Mathematics Chinese Remainder Theorem 40
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
Symmetric Ciphers Passwords as Keys 50
General Lemur XOR 40
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Keyed Permutations 5
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
General Greatest Common Divisor 15
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 Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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