Romyna

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Solved Challenges

RSA Public Keys 15
ZKPs OR Proof 75
CTF Archive OR Proof (CryptoHack) 0
Lattices From Private to Public Key LWE 25
Lattices LWE Intro 10
Lattices LWE Background 5
Lattices Gaussian Reduction 50
Diffie-Hellman Additive 70
Elliptic Curves Montgomery's Ladder 40
Crypto on the Web Saying Hello 20
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Mathematics Real Eisenstein 150
Mathematics Cofactor Cofantasy 150
Mathematics Roll your Own 125
Mathematics Adrien's Signs 80
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
Symmetric Ciphers Paper Plane 120
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Elliptic Curves Digestive 60
Isogenies Better than Linear 85
Isogenies Twisted CSIDH Isogenies 70
Isogenies Secret Exponents 60
Isogenies Prime Power Isogenies 50
Isogenies Special Isogenies 30
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
RSA Factoring 15
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Structure of AES 15
Elliptic Curves Efficient Exchange 50
Diffie-Hellman Deriving Symmetric Keys 40
Crypto on the Web No Way JOSE 20
Symmetric Ciphers Resisting Bruteforce 10
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
RSA Euler's Totient 20
RSA Modular Exponentiation 10
Elliptic Curves Point Addition 30
Hash Functions Jack's Birthday Confusion 30
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
Diffie-Hellman Working with Fields 10
General Encoding Challenge 40
General SSH Keys 35
General Transparency 50
General CERTainly not 30
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 Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General XOR Starter 10
General Bytes and Big Integers 10
Mathematics Broken RSA 100
Mathematics Modular Binomials 80
General Base64 10
RSA RSA Decryption 20
RSA Private Keys 20
Mathematics No Way Back Home 100
Mathematics Unencryptable 125
Mathematics Ellipse Curve Cryptography 125
Mathematics Successive Powers 60
CTF Archive Tenet: The Plagarism (HKCERT CTF) 0
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
Misc Armory 100
Misc L-Win 120
ZKPs ZKP Introduction 5
Introduction Network Attacks 5
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
Elliptic Curves Point Negation 10
Isogenies Introduction to Isogenies 10
Lattices Vectors 10
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Hash Functions Jack's Birthday Hash 20
Diffie-Hellman Generators of Groups 20
RSA RSA Signatures 25
Elliptic Curves Background Reading 5
Mathematics Chinese Remainder Theorem 40
Symmetric Ciphers Keyed Permutations 5
General Hex 5
General ASCII 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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