MattK

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Solved Challenges

Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Mathematics Unencryptable 125
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
Hash Functions Mixed Up 120
Symmetric Ciphers Oh SNAP 120
Symmetric Ciphers Dancing Queen 120
Misc L-Win 120
RSA Infinite Descent 50
Hash Functions PriMeD5 100
RSA Crossed Wires 100
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Paper Plane 120
Diffie-Hellman Static Client 2 120
Diffie-Hellman Export-grade 100
Diffie-Hellman Static Client 100
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
Misc RSA vs RNG 150
CTF Archive A Joke Cipher (HKCERT CTF) 0
ZKPs ZKP Introduction 5
Misc Toshi's Treasure 150
Hash Functions Jack's Birthday Hash 20
Diffie-Hellman Additive 70
RSA Ron was Wrong, Whit is Right 90
Symmetric Ciphers Stream of Consciousness 80
Hash Functions Jack's Birthday Confusion 30
RSA Marin's Secrets 50
Misc Armory 100
Crypto on the Web Secure Protocols 5
Mathematics Successive Powers 60
Hash Functions Merkle Trees 25
Hash Functions MD0 80
Mathematics Modular Binomials 80
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JSON in JSON 40
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 Broken RSA 100
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
RSA Signing Server 60
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
RSA Square Eyes 35
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
RSA Inferius Prime 30
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
RSA Manyprime 40
RSA Factoring 15
Diffie-Hellman Working with Fields 10
RSA Modulus Inutilis 50
RSA Salty 20
RSA Monoprime 30
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Misc Lo-Hi Card Game 120
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
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
Symmetric Ciphers Keyed Permutations 5
Misc No Leaks 100
Misc Gotta Go Fast 40
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Lemur XOR 40
General Encoding Challenge 40
Mathematics Quadratic Residues 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
Introduction Network Attacks 5
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 Great Snakes 3
Introduction Finding Flags 2

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