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Solved Challenges

Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Mathematics Quadratic Residues 25
General Extended GCD 20
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
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 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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