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Solved Challenges

Mathematics Quadratic Residues 25
General SSH Keys 35
Symmetric Ciphers CTRIME 70
Symmetric Ciphers ECB Oracle 60
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
Misc No Leaks 100
Misc Gotta Go Fast 40
General Lemur XOR 40
Crypto on the Web JSON in JSON 40
General Extended GCD 20
Hash Functions Collider 50
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Symmetry 50
General Transparency 50
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
RSA Square Eyes 35
RSA Factoring 15
General Encoding Challenge 40
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
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 Keyed Permutations 5
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
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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