Cheerfulbull

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Solved Challenges

Mathematics Modular Square Root 35
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
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Lattices LWE Intro 10
General Transparency 50
General Encoding Challenge 40
RSA RSA Backdoor Viability 175
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Everything is Still Big 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
Misc Gotta Go Fast 40
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
Lattices What's a Lattice? 40
Mathematics Legendre Symbol 35
General XOR Starter 10
Diffie-Hellman Additive 70
Hash Functions Collider 50
Hash Functions Jack's Birthday Confusion 30
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Symmetry 50
Crypto on the Web Sharks on the Wire 10
Crypto on the Web JSON in JSON 40
Hash Functions Jack's Birthday Hash 20
Lattices LWE Background 5
Crypto on the Web Secure Protocols 5
Elliptic Curves Background Reading 5
RSA Signing Server 60
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Parameter Injection 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers ECB CBC WTF 55
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Working with Fields 10
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
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
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
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 Quadratic Residues 25
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
General SSH Keys 35
General CERTainly not 30
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 XOR Properties 15
General Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Introduction Network Attacks 5
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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