Krako

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Solved Challenges

Misc Gotta Go Fast 40
Crypto on the Web RSA or HMAC? Part 2 100
Crypto on the Web RSA or HMAC? 35
Mathematics Broken RSA 100
Mathematics Adrien's Signs 80
ZKPs Too Honest 50
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
Crypto on the Web JSON in JSON 40
Mathematics Modular Binomials 80
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
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
Hash Functions Merkle Trees 25
Mathematics Successive Powers 60
Crypto on the Web JWT Secrets 25
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Misc Armory 100
Lattices Gaussian Reduction 50
Crypto on the Web Sharks on the Wire 10
Lattices What's a Lattice? 40
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Lattices Noise Free 40
Lattices Gram Schmidt 30
Crypto on the Web Secure Protocols 5
Diffie-Hellman Additive 70
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Elliptic Curves Exceptional Curves 100
Mathematics Chinese Remainder Theorem 40
Isogenies Image Point Arithmetic 30
Lattices From Private to Public Key LWE 25
Lattices LWE Intro 10
Lattices LWE Background 5
Isogenies Montgomery Curves 30
Isogenies Where's the Supersingular Curve 25
Isogenies The j-invariant 20
Isogenies Introduction to Isogenies 10
Elliptic Curves Smooth Criminal 60
RSA Let's Decrypt 80
RSA Null or Never 100
RSA Fast Primes 75
RSA Ron was Wrong, Whit is Right 90
Hash Functions Collider 50
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Working with Fields 10
RSA Crossed Wires 100
RSA Signing Server 60
RSA Endless Emails 150
RSA Everything is Still Big 100
RSA Marin's Secrets 50
RSA Infinite Descent 50
Symmetric Ciphers Passwords as Keys 50
Lattices Size and Basis 15
RSA Everything is Big 70
RSA RSA Signatures 25
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Bringing It All Together 50
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
RSA Square Eyes 35
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
ZKPs Proofs of Knowledge 20
ZKPs ZKP Introduction 5
RSA Modulus Inutilis 50
Elliptic Curves Background Reading 5
RSA Salty 20
RSA Manyprime 40
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
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
General Lemur XOR 40
General You either know, XOR you don't 30
Lattices Vectors 10
RSA RSA Decryption 20
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
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
General Favourite byte 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
General XOR Properties 15
General XOR Starter 10
General Encoding Challenge 40
General Bytes and Big Integers 10
General Base64 10
General Hex 5
Introduction Finding Flags 2
General ASCII 5
Introduction Network Attacks 5
Introduction Great Snakes 3

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