HyouKa

Two robots

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Solved Challenges

Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
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
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Passwords as Keys 50
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2
General Modular Arithmetic 1 20
General Modular Arithmetic 2 20
General Modular Inverting 25
Symmetric Ciphers Flipping Cookie 60
RSA Everything is Big 70
RSA Factoring 15
RSA Salty 20
RSA Modulus Inutilis 50
General Extended GCD 20
General Greatest Common Divisor 15
General Transparency 50
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General SSH Keys 35
General Encoding Challenge 40
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5
General Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General XOR Starter 10
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5

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