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Solved Challenges

Isogenies The j-invariant 20
Isogenies Introduction to Isogenies 10
Symmetric Ciphers Triple DES 60
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
ZKPs Too Honest 50
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
ZKPs ZKP Introduction 5
Lattices Noise Free 40
Mathematics Modular Binomials 80
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Lazy CBC 60
Hash Functions MD0 80
Hash Functions No Difference 175
Hash Functions Twin Keys 100
Hash Functions PriMeD5 100
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
RSA Fast Primes 75
Crypto on the Web Authenticated Handshake 40
Lattices LWE Intro 10
Lattices LWE Background 5
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Saying Hello 20
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Secure Protocols 5
General SSH Keys 35
Hash Functions Hash Stuffing 50
Crypto on the Web RSA or HMAC? Part 2 100
Lattices Find the Lattice 100
Misc Bruce Schneier's Password 100
Crypto on the Web JSON in JSON 40
Hash Functions Jack's Birthday Hash 20
Hash Functions Jack's Birthday Confusion 30
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
Hash Functions Collider 50
General Transparency 50
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
RSA Ron was Wrong, Whit is Right 90
Elliptic Curves Curveball 100
Mathematics Real Eisenstein 150
Misc Lo-Hi Card Game 120
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
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Symmetric Ciphers Flipping Cookie 60
General Lemur XOR 40
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Additive 70
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
Mathematics Quadratic Residues 25
Mathematics Adrien's Signs 80
General XOR Properties 15
RSA Vote for Pedro 150
RSA Blinding Light 120
RSA Signing Server 60
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Modulus Inutilis 50
RSA Salty 20
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
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 Square Eyes 35
RSA Manyprime 40
RSA RSA Signatures 25
Mathematics Successive Powers 60
Misc No Leaks 100
Misc Gotta Go Fast 40
General Encoding Challenge 40
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
Mathematics Chinese Remainder Theorem 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Introduction Network Attacks 5
Introduction Great Snakes 3
Elliptic Curves Background Reading 5
Symmetric Ciphers Modes of Operation Starter 15
General You either know, XOR you don't 30
General XOR Starter 10
General Favourite byte 20
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
General Greatest Common Divisor 15
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5
Introduction Finding Flags 2

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