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Solved Challenges

Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
Symmetric Ciphers Keyed Permutations 5
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
Elliptic Curves Smooth Criminal 60
Elliptic Curves Montgomery's Ladder 40
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Working with Fields 10
RSA Modulus Inutilis 50
RSA Manyprime 40
RSA Monoprime 30
RSA Factoring 15
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
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
Lattices Nativity 60
Lattices Gaussian Reduction 50
Lattices Find the Lattice 100
Elliptic Curves Moving Problems 150
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Efficient Exchange 50
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
Crypto on the Web RSA or HMAC? Part 2 100
Mathematics Chinese Remainder Theorem 40
Mathematics Real Eisenstein 150
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Successive Powers 60
Misc Jeff's LFSR 150
Misc Armory 100
Misc Bit by Bit 100
Misc L-Win 120
Misc RSA vs RNG 150
Diffie-Hellman Script Kiddie 70
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Mathematics Unencryptable 125
Mathematics Ellipse Curve Cryptography 125
Mathematics No Way Back Home 100
Mathematics Broken RSA 100
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Oh SNAP 120
Symmetric Ciphers Dancing Queen 120
Isogenies A True Genus 175
Isogenies Breaking SIDH 250
RSA Vote for Pedro 150
RSA Let's Decrypt Again 175
RSA Endless Emails 150
RSA RSA Backdoor Viability 175
RSA Crossed Wires 100
RSA Salty 20
General Greatest Common Divisor 15
General Encoding Challenge 40
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
Introduction Network Attacks 5
General ASCII 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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