ZanCTF

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Solved Challenges

RSA RSA Backdoor Viability 175
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Symmetric Ciphers Bringing It All Together 50
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Computing Public Values 25
RSA Signing Server 60
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Endless Emails 150
Mathematics Adrien's Signs 80
Mathematics Modular Binomials 80
Symmetric Ciphers Diffusion through Permutation 30
RSA Everything is Still Big 100
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
RSA Crossed Wires 100
RSA Everything is Big 70
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
RSA Modulus Inutilis 50
General Lemur XOR 40
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Public Keys 15
Diffie-Hellman Working with Fields 10
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
RSA Private Keys 20
RSA Euler's Totient 20
RSA Modular Exponentiation 10
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 Greatest Common Divisor 15
General Encoding Challenge 40
Introduction Network Attacks 5
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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