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Solved Challenges

Mathematics Legendre Symbol 35
Diffie-Hellman Diffie-Hellman Starter 2 20
Symmetric Ciphers Passwords as Keys 50
Diffie-Hellman Diffie-Hellman Starter 1 10
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Stream of Consciousness 80
RSA RSA Starter 3 20
Mathematics Quadratic Residues 25
General Encoding Challenge 40
General Extended GCD 20
General Greatest Common Divisor 15
General Lemur XOR 40
RSA Factoring 15
Symmetric Ciphers Oh SNAP 120
Hash Functions Collider 50
Crypto on the Web RSA or HMAC? Part 2 100
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Elliptic Curves Background Reading 5
RSA RSA Starter 2 15
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Symmetric Ciphers CTRIME 70
Crypto on the Web Saying Hello 20
Crypto on the Web Token Appreciation 5
General Modular Inverting 25
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Modes of Operation Starter 15
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General SSH Keys 35
General Transparency 50
General You either know, XOR you don't 30
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Triple DES 60
RSA RSA Starter 1 10
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers ECB CBC WTF 55
Introduction Network Attacks 5
Crypto on the Web Secure Protocols 5
Crypto on the Web JSON in JSON 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
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
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 Great Snakes 3
Introduction Finding Flags 2

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