Hammer

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Submitted Solutions

Extended GCD 0

Solved Challenges

Isogenies Meet me in the Claw 120
Isogenies Dual Masters 90
Isogenies Abelian SIDH 90
Isogenies Better than Linear 85
Isogenies A True Genus 175
Isogenies André Encoding 80
Isogenies What's My Kernel 70
Isogenies CSIDH Key Exchange 90
Isogenies Twisted CSIDH Isogenies 70
Isogenies Secret Exponents 60
Isogenies Prime Power Isogenies 50
Isogenies Special Isogenies 30
Isogenies Breaking SIDH 250
Isogenies SIDH Key Exchange 80
Isogenies Composite Isogenies 60
Isogenies Three Isogenies 35
Isogenies Two Isogenies 30
Isogenies DLOG on the Surface 40
Isogenies Montgomery Curves 30
Isogenies Image Point Arithmetic 30
Isogenies Where's the Supersingular Curve 25
Isogenies The j-invariant 20
Isogenies Introduction to Isogenies 10
Symmetric Ciphers ECB CBC WTF 55
Mathematics Unencryptable 125
Mathematics No Way Back Home 100
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Lattices LWE Background 5
Mathematics Modular Binomials 80
Mathematics Successive Powers 60
Mathematics Adrien's Signs 80
Mathematics Broken RSA 100
Diffie-Hellman Export-grade 100
Hash Functions MD0 80
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Diffie-Hellman Parameter Injection 60
Elliptic Curves Smooth Criminal 60
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
RSA RSA Backdoor Viability 175
RSA Ron was Wrong, Whit is Right 90
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Lattices Gram Schmidt 30
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
Lattices Size and Basis 15
Lattices Vectors 10
RSA Endless Emails 150
General SSH Keys 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
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
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Everything is Big 70
RSA Modulus Inutilis 50
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 Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Mathematics Quadratic Residues 25
General Transparency 50
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Lemur XOR 40
General You either know, XOR you don't 30
General XOR Properties 15
General Favourite byte 20
General Extended GCD 20
General Greatest Common Divisor 15
General Modular Arithmetic 1 20
General Modular Arithmetic 2 20
General Modular Inverting 25
General XOR Starter 10
General Encoding Challenge 40
General Bytes and Big Integers 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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