zrk

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Solved Challenges

RSA Endless Emails 150
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Infinite Descent 50
RSA RSA Starter 6 25
RSA Marin's Secrets 50
RSA Everything is Big 70
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Symmetry 50
RSA Modulus Inutilis 50
RSA Salty 20
RSA Square Eyes 35
RSA Manyprime 40
RSA Monoprime 30
Hash Functions MD0 80
Hash Functions Collider 50
Misc No Leaks 100
Misc Gotta Go Fast 40
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
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
Symmetric Ciphers Resisting Bruteforce 10
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
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
Mathematics Gaussian Reduction 50
Mathematics What's a Lattice? 40
Mathematics Gram Schmidt 30
Mathematics Successive Powers 60
Mathematics Size and Basis 15
Mathematics Vectors 10
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Mathematics Modular Square Root 35
Mathematics Chinese Remainder Theorem 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Lemur XOR 40
General Encoding Challenge 40
General XOR Properties 15
General Bytes and Big Integers 10
RSA Inferius Prime 30
RSA Factoring 15
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
Symmetric Ciphers Keyed Permutations 5
General Transparency 50
General Privacy-Enhanced Mail? 25
General CERTainly not 30
General You either know, XOR you don't 30
General Extended GCD 20
General Greatest Common Divisor 15
General Favourite byte 20
General XOR Starter 10
General Base64 10
General Hex 5
General ASCII 5
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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