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Solved Challenges

Hash Functions MD0 80
RSA Everything is Still Big 100
RSA Endless Emails 150
Mathematics Broken RSA 100
RSA Infinite Descent 50
RSA Marin's Secrets 50
RSA Crossed Wires 100
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Mathematics Gaussian Reduction 50
Hash Functions Jack's Birthday Confusion 30
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Diffie-Hellman Script Kiddie 70
Crypto on the Web RSA or HMAC? 35
Misc Gotta Go Fast 40
Crypto on the Web JSON in JSON 40
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Diffie-Hellman Static Client 100
Diffie-Hellman Additive 70
Diffie-Hellman Export-grade 100
Symmetric Ciphers Bean Counter 60
Diffie-Hellman Parameter Injection 60
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 2 20
Diffie-Hellman Diffie-Hellman Starter 1 10
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Elliptic Curves Background Reading 5
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
RSA Everything is Big 70
Mathematics What's a Lattice? 40
Mathematics Gram Schmidt 30
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Inferius Prime 30
RSA Monoprime 30
Hash Functions Jack's Birthday Hash 20
RSA Factoring 15
RSA RSA Starter 6 25
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
Mathematics Successive Powers 60
Mathematics Size and Basis 15
General CERTainly not 30
General Transparency 50
Mathematics Adrien's Signs 80
Mathematics Vectors 10
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
General SSH Keys 35
Hash Functions Collider 50
General Encoding Challenge 40
Introduction Network Attacks 5
Mathematics Quadratic Residues 25
General Privacy-Enhanced Mail? 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 Lemur XOR 40
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
Symmetric Ciphers Keyed Permutations 5
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
Introduction Great Snakes 3
Introduction Finding Flags 2

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