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Submitted Solutions

RSA vs RNG 2

Solved Challenges

Elliptic Curves Checkpoint 150
Elliptic Curves A Twisted Mind 80
Isogenies SIDH Key Exchange 80
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
Isogenies Introduction to Isogenies 10
CTF Archive ed25519 magic (ICC Athens) 0
CTF Archive pekobot (AIS3 Pre-Exam) 0
CTF Archive Key Backup Service 2 (HKCERT CTF) 0
CTF Archive Key Backup Service 1 (HKCERT CTF) 0
CTF Archive Chaos (Zh3r0 CTF V2) 0
CTF Archive Irish flan (ECSC 2023 (Norway)) 0
CTF Archive Put a ring on it (ECSC 2023 (Norway)) 0
CTF Archive Oofbleck (Firebird Internal CTF) 0
CTF Archive Blind (ECSC 2023 (Norway)) 0
CTF Archive Hide and seek (ECSC 2023 (Norway)) 0
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive Twist and shout (ECSC 2023 (Norway)) 0
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive Cipher Mode Picker (HKCERT CTF) 0
CTF Archive Sratslla SEA (HKCERT CTF) 0
CTF Archive Twist and Shout (Zh3r0 CTF V2) 0
CTF Archive Unevaluated (TETCTF) 0
CTF Archive Tenet: The Plagarism (HKCERT CTF) 0
CTF Archive import numpy as MT (Zh3r0 CTF V2) 0
CTF Archive d-phi-enc (HackTM CTF) 0
Misc Bruce Schneier's Password: Part 2 250
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Megalomaniac 3 120
Crypto on the Web Megalomaniac 2 120
Lattices Noise Cheap 90
Crypto on the Web Megalomaniac 1 100
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Lattices Missing Modulus 80
Lattices Noise Free 40
Elliptic Curves Digestive 60
Lattices Nativity 60
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
Misc RSA vs RNG 150
Misc LFSR Destroyer 250
CTF Archive Unimplemented (TETCTF) 0
CTF Archive 1337crypt (DownUnderCTF) 0
CTF Archive Sign in Please (HKCERT CTF) 0
CTF Archive Calm Down (HKCERT CTF) 0
CTF Archive 2020 (TETCTF) 0
Elliptic Curves Real Curve Crypto 200
Hash Functions Invariant 250
Hash Functions MDFlag 125
Crypto on the Web Saying Hello 20
Symmetric Ciphers Beatboxer 150
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Secure Protocols 5
Mathematics No Way Back Home 100
Diffie-Hellman The Matrix Revolutions 125
RSA Let's Decrypt Again 175
Mathematics Roll your Own 125
Hash Functions Mixed Up 120
Hash Functions Twin Keys 100
Hash Functions PriMeD5 100
Crypto on the Web JSON in JSON 40
Elliptic Curves Double and Broken 50
Misc Bruce Schneier's Password 100
Hash Functions No Difference 175
Misc Trust Games 150
Diffie-Hellman The Matrix Reloaded 100
Elliptic Curves No Random, No Bias 120
Elliptic Curves Edwards Goes Degenerate 100
Crypto on the Web RSA or HMAC? Part 2 100
Crypto on the Web RSA or HMAC? 35
Lattices Too Many Errors 100
Misc Nothing Up My Sleeve 150
Symmetric Ciphers Dancing Queen 120
Misc Toshi's Treasure 150
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Paper Plane 120
Mathematics Ellipse Curve Cryptography 125
Diffie-Hellman Static Client 2 120
Mathematics Cofactor Cofantasy 150
RSA Vote for Pedro 150
Elliptic Curves Moving Problems 150
Mathematics Prime and Prejudice 200
Mathematics Real Eisenstein 150
Misc Jeff's LFSR 150
Misc L-Win 120
RSA RSA Backdoor Viability 175
Elliptic Curves Micro Transmissions 120
Elliptic Curves Elliptic Nodes 150
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Mathematics Broken RSA 100
Mathematics Unencryptable 125
Diffie-Hellman Static Client 100
RSA Null or Never 100
RSA Bespoke Padding 100
Misc Lo-Hi Card Game 120
Misc Bit by Bit 100
Misc Armory 100
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
RSA Endless Emails 150
Symmetric Ciphers Oh SNAP 120
Diffie-Hellman The Matrix 75
Hash Functions Hash Stuffing 50
General SSH Keys 35
Diffie-Hellman Additive 70
Diffie-Hellman Script Kiddie 70
Elliptic Curves Montgomery's Ladder 40
Elliptic Curves Exceptional Curves 100
Symmetric Ciphers Triple DES 60
RSA Ron was Wrong, Whit is Right 90
Hash Functions Collider 50
Hash Functions MD0 80
Misc No Leaks 100
Misc Gotta Go Fast 40
RSA Fast Primes 75
RSA Blinding Light 120
RSA Let's Decrypt 80
RSA Signing Server 60
RSA Marin's Secrets 50
RSA Infinite Descent 50
Mathematics Adrien's Signs 80
Mathematics Modular Binomials 80
RSA Everything is Still Big 100
RSA Crossed Wires 100
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
RSA Everything is Big 70
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Elliptic Curves Smooth Criminal 60
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Crypto on the Web Token Appreciation 5
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 Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
RSA RSA Starter 6 25
RSA RSA Starter 5 20
RSA RSA Starter 4 20
RSA RSA Starter 3 20
RSA RSA Starter 2 15
RSA RSA Starter 1 10
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Symmetric Ciphers Modes of Operation Starter 15
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
General Transparency 50
Mathematics Successive Powers 60
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
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 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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