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Solved Challenges

Symmetric Ciphers Symmetry 50
Lattices Too Many Errors 100
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
RSA Signing Server 60
RSA Manyprime 40
RSA Square Eyes 35
Misc No Leaks 100
Misc Bruce Schneier's Password 100
Misc Gotta Go Fast 40
General Encoding Challenge 40
Mathematics Cofactor Cofantasy 150
RSA RSA Signatures 25
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Mathematics Unencryptable 125
Lattices Gaussian Reduction 50
Mathematics Chinese Remainder Theorem 40
RSA Infinite Descent 50
RSA Everything is Still Big 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
Symmetric Ciphers Passwords as Keys 50
RSA Inferius Prime 30
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
General Lemur XOR 40
RSA Marin's Secrets 50
Elliptic Curves Efficient Exchange 50
General You either know, XOR you don't 30
Mathematics Modular Binomials 80
Mathematics Successive Powers 60
General Base64 10
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Elliptic Curves Point Negation 10
Elliptic Curves Curves and Logs 40
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Keyed Permutations 5
Symmetric Ciphers Resisting Bruteforce 10
Elliptic Curves Scalar Multiplication 35
Diffie-Hellman Deriving Symmetric Keys 40
Elliptic Curves Point Addition 30
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Generators of Groups 20
Mathematics Legendre Symbol 35
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Quadratic Residues 25
RSA Monoprime 30
RSA RSA Decryption 20
RSA Private Keys 20
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
Elliptic Curves Background Reading 5
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Working with Fields 10
RSA Factoring 15
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
General Favourite byte 20
General XOR Properties 15
General XOR Starter 10
General Bytes and Big Integers 10
General Hex 5
General ASCII 5
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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