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Solved Challenges

Misc Lo-Hi Card Game 120
Isogenies Introduction to Isogenies 10
Isogenies The j-invariant 20
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
Hash Functions MD0 80
Hash Functions PriMeD5 100
Hash Functions Hash Stuffing 50
Lattices Backpack Cryptography 120
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
Elliptic Curves Digestive 60
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Micro Transmissions 120
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Elliptic Curves Smooth Criminal 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Bringing It All Together 50
Diffie-Hellman The Matrix 75
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Static Client 2 120
Mathematics Roll your Own 125
Crypto on the Web JWT Secrets 25
Lattices Noise Free 40
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Lattices LWE Intro 10
Lattices LWE Background 5
Lattices Find the Lattice 100
RSA Ron was Wrong, Whit is Right 90
RSA Endless Emails 150
Crypto on the Web No Way JOSE 20
Mathematics No Way Back Home 100
Diffie-Hellman Additive 70
RSA Vote for Pedro 150
RSA Bespoke Padding 100
Hash Functions Collider 50
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Misc No Leaks 100
Misc Gotta Go Fast 40
RSA Null or Never 100
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
General Lemur XOR 40
RSA Blinding Light 120
Diffie-Hellman Static Client 100
Mathematics Unencryptable 125
Mathematics Ellipse Curve Cryptography 125
Mathematics Broken RSA 100
Mathematics Successive Powers 60
Lattices Size and Basis 15
Lattices Vectors 10
RSA Let's Decrypt 80
RSA Signing Server 60
RSA RSA Backdoor Viability 175
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Everything is Big 70
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Symmetric Ciphers Diffusion through Permutation 30
Elliptic Curves Point Negation 10
RSA Square Eyes 35
RSA Inferius Prime 30
Elliptic Curves Background Reading 5
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
General You either know, XOR you don't 30
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 Salty 20
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 Keyed Permutations 5
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
General Favourite byte 20
General XOR Properties 15
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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