Howard

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Submitted Solutions

Signing Server 0
Everything is Still Big -5
Crossed Wires 0
Everything is Big 0
Monoprime 0
Manyprime 0
RSA Signatures 0
Modulus Inutilis 0
Square Eyes 1
Inferius Prime 1
Gotta Go Fast 0
Curves and Logs 0
Scalar Multiplication 0
Point Addition 0

Solved Challenges

Symmetric Ciphers Passwords as Keys 50
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
Mathematics Successive Powers 60
RSA Endless Emails 150
Diffie-Hellman Additive 70
Diffie-Hellman Export-grade 100
Misc Toshi's Treasure 150
Lattices LWE Background 5
Lattices Gaussian Reduction 50
Lattices Gram Schmidt 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
Hash Functions Jack's Birthday Hash 20
RSA Signing Server 60
RSA Infinite Descent 50
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Everything is Big 70
RSA RSA Signatures 25
Hash Functions Collider 50
Misc No Leaks 100
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
Misc Lo-Hi Card Game 120
Misc Gotta Go Fast 40
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
Crypto on the Web RSA or HMAC? Part 2 100
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
General Transparency 50
General SSH Keys 35
Diffie-Hellman Parameter Injection 60
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General You either know, XOR you don't 30
General Favourite byte 20
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Generators of Groups 20
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Mathematics Chinese Remainder Theorem 40
Mathematics Legendre Symbol 35
Mathematics Modular Square Root 35
General Lemur XOR 40
General XOR Properties 15
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
Symmetric Ciphers Structure of AES 15
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
General XOR Starter 10
General Encoding Challenge 40
General Bytes and Big Integers 10
General Base64 10
General Hex 5
Lattices What's a Lattice? 40
Lattices Size and Basis 15
Elliptic Curves Background Reading 5
Diffie-Hellman Working with Fields 10
General ASCII 5
Introduction Great Snakes 3
Lattices Vectors 10
Mathematics Quadratic Residues 25
RSA Public Keys 15
RSA Modular Exponentiation 10
RSA Factoring 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Introduction Network Attacks 5
Introduction Finding Flags 2

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