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Submitted Solutions

Greatest Common Divisor 0
Extended GCD 0
Modular Arithmetic 1 0
Modular Arithmetic 2 0
Quadratic Residues 0
Structure of AES 0
Round Keys 0

Solved Challenges

Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
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
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
General Encoding Challenge 40
General Lemur XOR 40
Mathematics Quadratic Residues 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
Introduction Network Attacks 5
General You either know, XOR you don't 30
General Favourite byte 20
General Greatest Common Divisor 15
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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