ckha

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Solved Challenges

RSA Vote for Pedro 150
RSA Let's Decrypt 80
RSA RSA Backdoor Viability 175
Hash Functions MDFlag 125
Diffie-Hellman Additive 70
Diffie-Hellman Parameter Injection 60
RSA Fast Primes 75
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Monoprime 30
RSA Factoring 15
Mathematics Successive Powers 60
Mathematics Find the Lattice 100
Mathematics What's a Lattice? 40
Mathematics Gram Schmidt 30
Mathematics Chinese Remainder Theorem 40
General SSH Keys 35
General Privacy-Enhanced Mail? 25
General CERTainly not 30
Mathematics Modular Square Root 35
General Lemur XOR 40
General Encoding Challenge 40
Introduction Network Attacks 5
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 ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Hash Functions MD0 80
Hash Functions PriMeD5 100
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 Resisting Bruteforce 10
Introduction Great Snakes 3
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Keyed Permutations 5
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
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 Gaussian Reduction 50
Mathematics Size and Basis 15
Mathematics Vectors 10
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Transparency 50
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
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 Finding Flags 2

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