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Solved Challenges

Lattices What's a Lattice? 40
Lattices Size and Basis 15
Lattices Vectors 10
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Hash Functions Collider 50
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
RSA Factoring 15
Diffie-Hellman Working with Fields 10
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
General Extended GCD 20
General Greatest Common Divisor 15
ZKPs ZKP Introduction 5
Crypto on the Web Secure Protocols 5
Crypto on the Web JSON in JSON 40
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
Misc Bruce Schneier's Password 100
Misc No Leaks 100
Misc Gotta Go Fast 40
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Transparency 50
General XOR Properties 15
General Favourite byte 20
General You either know, XOR you don't 30
General XOR Starter 10
General Encoding Challenge 40
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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