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Solved Challenges

CTF Archive Tenet: The Plagarism (HKCERT CTF) 0
CTF Archive What a Curve! (Breizh CTF) 0
CTF Archive d-phi-enc (HackTM CTF) 0
ZKPs ZKP Introduction 5
CTF Archive Sus (ImaginaryCTF) 0
CTF Archive Sratslla SEA (HKCERT CTF) 0
CTF Archive Share (HITCON CTF) 0
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
CTF Archive Probability (SEETF) 0
CTF Archive import numpy as MT (Zh3r0 CTF V2) 0
CTF Archive Put a ring on it (ECSC 2023 (Norway)) 0
CTF Archive Sign in Please (HKCERT CTF) 0
ZKPs Proofs of Knowledge 20
Elliptic Curves ProSign 3 100
RSA Private Keys 20
Mathematics Prime and Prejudice 200
Hash Functions PriMeD5 100
Elliptic Curves Point Negation 10
Elliptic Curves Point Addition 30
ZKPs Pairing-Based Cryptography 50
Symmetric Ciphers Pad Thai 80
CTF Archive One Round Crypto (ECSC 2024 (Italy)) 0
CTF Archive Oofbleck (Firebird Internal CTF) 0
CTF Archive OR Proof (CryptoHack) 0
Misc Nothing Up My Sleeve 150
Lattices Noise Free 40
Lattices Noise Cheap 90
Crypto on the Web No Way JOSE 20
Mathematics No Way Back Home 100
Elliptic Curves No Random, No Bias 120
Misc No Leaks 100
Lattices Nativity 60
Elliptic Curves Moving Problems 150
Lattices Missing Modulus 80
Elliptic Curves Micro Transmissions 120
Hash Functions Merkle Trees 25
Crypto on the Web Megalomaniac 2 120
Hash Functions MD0 80
ZKPs Let's Prove It Again 175
ZKPs Let's Prove It 120
RSA Let's Decrypt Again 175
Mathematics Legendre Symbol 35
CTF Archive Leet Universe (ImaginaryCTF (Daily)) 0
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
Lattices LWE Low Bits Message 20
Lattices LWE Intro 10
Lattices LWE High Bits Message 15
Lattices LWE Background 5
Misc L-Win 120
CTF Archive Key Backup Service 2 (HKCERT CTF) 0
CTF Archive Key Backup Service 1 (HKCERT CTF) 0
Hash Functions Jack's Birthday Hash 20
Hash Functions Jack's Birthday Confusion 30
Crypto on the Web JWT Secrets 25
Crypto on the Web JSON in JSON 40
ZKPs Honest Verifier Zero Knowledge 30
Hash Functions Hash Stuffing 50
Elliptic Curves Exceptional Curves 100
Elliptic Curves Elliptic Nodes 150
Lattices Gram Schmidt 30
Lattices Find the Lattice 100
Elliptic Curves Efficient Exchange 50
Mathematics Cofactor Cofantasy 150
CTF Archive Chaos (Zh3r0 CTF V2) 0
Elliptic Curves Double and Broken 50
Elliptic Curves Digestive 60
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Elliptic Curves Curveball 100
ZKPs Couples 100
Hash Functions Collider 50
CTF Archive Cipher Mode Picker (HKCERT CTF) 0
Mathematics Chinese Remainder Theorem 40
CTF Archive Calm Down (HKCERT CTF) 0
Misc Bruce Schneier's Password 100
Misc Bit by Bit 100
CTF Archive Authentification 1 (Breizh CTF) 0
Mathematics Modular Binomials 80
Hash Functions Mixed Up 120
Mathematics Modular Square Root 35
ZKPs Mister Saplins The Prover 125
ZKPs Mister Saplin's Preview 80
CTF Archive Authenticator (Firebird Internal CTF) 0
Crypto on the Web Authenticated Handshake 40
Misc Armory 100
Mathematics Adrien's Signs 80
CTF Archive Additional problems (CSC Belgium) 0
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive 2020 (TETCTF) 0
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
Misc Jeff's LFSR 150
Isogenies Meet me in the Claw 120
Symmetric Ciphers Stream of Consciousness 80
Isogenies Dual Masters 90
Misc Lo-Hi Card Game 120
Isogenies Abelian SIDH 90
Misc Gotta Go Fast 40
Symmetric Ciphers Logon Zero 80
Diffie-Hellman Static Client 100
Symmetric Ciphers Oh SNAP 120
Diffie-Hellman Static Client 2 120
Symmetric Ciphers Paper Plane 120
RSA Bespoke Padding 100
RSA Let's Decrypt 80
Isogenies What's My Kernel 70
Symmetric Ciphers Dancing Queen 120
Isogenies Prime Power Isogenies 50
RSA Blinding Light 120
Isogenies DLOG on the Surface 40
Isogenies Where's the Supersingular Curve 25
Isogenies Image Point Arithmetic 30
Diffie-Hellman Parameter Injection 60
RSA RSA Decryption 20
Diffie-Hellman Generators of Groups 20
Isogenies Montgomery Curves 30
Symmetric Ciphers Beatboxer 150
Isogenies The j-invariant 20
Isogenies Introduction to Isogenies 10
Symmetric Ciphers Forbidden Fruit 150
Diffie-Hellman Export-grade 100
RSA Vote for Pedro 150
Diffie-Hellman The Matrix 75
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Additive 70
RSA Ron was Wrong, Whit is Right 90
RSA Null or Never 100
RSA Endless Emails 150
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 Everything is Still Big 100
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Signing Server 60
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers CTRIME 70
RSA Square Eyes 35
RSA Fast Primes 75
RSA Manyprime 40
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Flipping Cookie 60
RSA Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
RSA Monoprime 30
RSA Factoring 15
RSA RSA Signatures 25
RSA Inferius Prime 30
RSA Modular Exponentiation 10
Symmetric Ciphers ECB Oracle 60
RSA Euler's Totient 20
RSA Public Keys 15
General SSH Keys 35
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Structure of AES 15
General Transparency 50
General Privacy-Enhanced Mail? 25
Symmetric Ciphers Round Keys 20
General Modular Arithmetic 1 20
General Modular Inverting 25
General Encoding Challenge 40
General CERTainly not 30
General Modular Arithmetic 2 20
General Extended GCD 20
Symmetric Ciphers Modes of Operation Starter 15
General Greatest Common Divisor 15
General XOR Properties 15
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Diffusion through Permutation 30
General Favourite byte 20
General You either know, XOR you don't 30
Symmetric Ciphers Keyed Permutations 5
General XOR Starter 10
Symmetric Ciphers Resisting Bruteforce 10
General ASCII 5
General Bytes and Big Integers 10
General Base64 10
General Hex 5
Introduction Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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