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Solved Challenges

Mathematics Broken RSA 100
Mathematics Successive Powers 60
General CERTainly not 30
Mathematics Gaussian Reduction 50
Mathematics What's a Lattice? 40
Mathematics Gram Schmidt 30
Mathematics Size and Basis 15
RSA Fast Primes 75
RSA Everything is Still Big 100
Mathematics Vectors 10
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Keyed Permutations 5
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
General Encoding Challenge 40
General Privacy-Enhanced Mail? 25
Elliptic Curves Background Reading 5
Symmetric Ciphers ECB CBC WTF 55
Mathematics Chinese Remainder Theorem 40
Diffie-Hellman Diffie-Hellman Starter 5 40
Diffie-Hellman Diffie-Hellman Starter 4 30
Diffie-Hellman Diffie-Hellman Starter 3 20
Diffie-Hellman Diffie-Hellman Starter 1 10
RSA Marin's Secrets 50
RSA Infinite Descent 50
Symmetric Ciphers Modes of Operation Starter 15
Misc Gotta Go Fast 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
General Lemur XOR 40
General You either know, XOR you don't 30
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
RSA Crossed Wires 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
RSA RSA Starter 5 20
RSA RSA Starter 4 20
RSA RSA Starter 3 20
RSA RSA Starter 2 15
RSA RSA Starter 1 10
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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