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Solved Challenges

Symmetric Ciphers Symmetry 50
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers ECB Oracle 60
Elliptic Curves Smooth Criminal 60
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
Elliptic Curves Background Reading 5
Lattices LWE Intro 10
Lattices LWE Background 5
Lattices Find the Lattice 100
Lattices Gaussian Reduction 50
Mathematics Adrien's Signs 80
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Modes of Operation Starter 15
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Saying Hello 20
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Secure Protocols 5
Crypto on the Web JSON in JSON 40
Mathematics Unencryptable 125
Mathematics Modular Binomials 80
Mathematics Broken RSA 100
Lattices Gram Schmidt 30
Lattices Vectors 10
Lattices What's a Lattice? 40
RSA Signing Server 60
RSA Marin's Secrets 50
RSA Everything is Still Big 100
Mathematics Successive Powers 60
Hash Functions Jack's Birthday Confusion 30
General Transparency 50
General SSH Keys 35
General CERTainly not 30
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Lattices Size and Basis 15
Hash Functions Collider 50
Misc Gotta Go Fast 40
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Round Keys 20
Diffie-Hellman Additive 70
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
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
RSA Infinite Descent 50
RSA Crossed Wires 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
RSA Factoring 15
RSA Inferius Prime 30
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Public Keys 15
RSA Modular Exponentiation 10
RSA Euler's Totient 20
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Mathematics Chinese Remainder Theorem 40
General Privacy-Enhanced Mail? 25
General Modular Arithmetic 2 20
General Favourite byte 20
General Extended GCD 20
General Modular Inverting 25
General Modular Arithmetic 1 20
General Greatest Common Divisor 15
General You either know, XOR you don't 30
General XOR Properties 15
General XOR Starter 10
General Lemur XOR 40
General Encoding Challenge 40
General Base64 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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