Codru

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Solved Challenges

Mathematics No Way Back Home 100
Symmetric Ciphers Modes of Operation Starter 15
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
Mathematics Successive Powers 60
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
General ASCII 5
General Hex 5
General Base64 10
General XOR Properties 15
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Starter 10
General Bytes and Big Integers 10
Introduction Finding Flags 2
Introduction Great Snakes 3

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