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Submitted Solutions

Generators of Groups 1
Passwords as Keys 2

Solved Challenges

RSA Endless Emails 150
Elliptic Curves Background Reading 5
Misc No Leaks 100
Symmetric Ciphers Bringing It All Together 50
Mathematics Modular Binomials 80
Mathematics Successive Powers 60
Lattices What's a Lattice? 40
RSA Everything is Big 70
Crypto on the Web JSON in JSON 40
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
RSA Modulus Inutilis 50
RSA Manyprime 40
RSA Salty 20
RSA Square Eyes 35
RSA Inferius Prime 30
RSA RSA Signatures 25
Diffie-Hellman Script Kiddie 70
RSA Factoring 15
Diffie-Hellman Additive 70
RSA Monoprime 30
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Mathematics Modular Square Root 35
General SSH Keys 35
General Transparency 50
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Working with Fields 10
Hash Functions Jack's Birthday Confusion 30
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Hash Functions Jack's Birthday Hash 20
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General CERTainly not 30
General Privacy-Enhanced Mail? 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 Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General Encoding Challenge 40
General XOR Starter 10
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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