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Solved Challenges

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
Hash Functions Merkle Trees 25
Symmetric Ciphers The Good, The Pad, The Ugly 100
CTF Archive OR Proof (CryptoHack) 0
ZKPs OR Proof 75
ZKPs Too Honest 50
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
Symmetric Ciphers Pad Thai 80
ZKPs ZKP Introduction 5
CTF Archive Twist and shout (ECSC 2023 (Norway)) 0
CTF Archive Irish flan (ECSC 2023 (Norway)) 0
Misc LFSR Destroyer 250
Crypto on the Web Megalomaniac 2 120
Hash Functions Invariant 250
Lattices Noise Cheap 90
CTF Archive Hide and seek (ECSC 2023 (Norway)) 0
CTF Archive Put a ring on it (ECSC 2023 (Norway)) 0
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
CTF Archive Blind (ECSC 2023 (Norway)) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
Symmetric Ciphers Beatboxer 150
Misc Bruce Schneier's Password: Part 2 250
Diffie-Hellman The Matrix Revolutions 125
Crypto on the Web Megalomaniac 3 120
Elliptic Curves Real Curve Crypto 200
Crypto on the Web Megalomaniac 1 100
Crypto on the Web Authenticated Handshake 40
Hash Functions MDFlag 125
Misc Toshi's Treasure 150
Misc Jeff's LFSR 150
Lattices Missing Modulus 80
Elliptic Curves Double and Broken 50
Elliptic Curves Edwards Goes Degenerate 100
Lattices Too Many Errors 100
Lattices Nativity 60
Lattices Noise Free 40
Hash Functions Mixed Up 120
Diffie-Hellman The Matrix Reloaded 100
Elliptic Curves No Random, No Bias 120
Misc Nothing Up My Sleeve 150
Misc Trust Games 150
Misc RSA vs RNG 150
Elliptic Curves Digestive 60
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Micro Transmissions 120
Elliptic Curves Moving Problems 150
RSA Let's Decrypt Again 175
Elliptic Curves ProSign 3 100
Symmetric Ciphers Oh SNAP 120
Symmetric Ciphers Forbidden Fruit 150
Hash Functions No Difference 175
Hash Functions Twin Keys 100
Symmetric Ciphers Paper Plane 120
Hash Functions Hash Stuffing 50
Hash Functions PriMeD5 100
Hash Functions MD0 80
RSA Vote for Pedro 150
RSA Blinding Light 120
RSA Let's Decrypt 80
RSA Bespoke Padding 100
RSA RSA Backdoor Viability 175
RSA Signing Server 60
RSA Null or Never 100
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
RSA Endless Emails 150
RSA Everything is Still Big 100
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
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
Elliptic Curves Exceptional Curves 100
Misc Bruce Schneier's Password 100
Misc Armory 100
Misc L-Win 120
RSA Fast Primes 75
Hash Functions Collider 50
Symmetric Ciphers Dancing Queen 120
Symmetric Ciphers Logon Zero 80
Misc Lo-Hi Card Game 120
Mathematics Prime and Prejudice 200
Mathematics Real Eisenstein 150
Mathematics Unencryptable 125
Mathematics Cofactor Cofantasy 150
Mathematics Roll your Own 125
Mathematics Ellipse Curve Cryptography 125
Lattices LWE Intro 10
Lattices LWE Background 5
RSA Ron was Wrong, Whit is Right 90
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers CTRIME 70
Lattices Backpack Cryptography 120
RSA Crossed Wires 100
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
Misc Bit by Bit 100
Diffie-Hellman Script Kiddie 70
Diffie-Hellman The Matrix 75
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Elliptic Curves Curveball 100
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
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Elliptic Curves Smooth Criminal 60
Elliptic Curves Montgomery's Ladder 40
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
RSA Marin's Secrets 50
RSA Infinite Descent 50
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Misc No Leaks 100
Misc Gotta Go Fast 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
CTF Archive Unbalanced (ICC Athens) 0
Diffie-Hellman Additive 70
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Lattices Find the Lattice 100
Mathematics No Way Back Home 100
Lattices Gaussian Reduction 50
Mathematics Broken RSA 100
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
Elliptic Curves Background Reading 5
RSA Everything is Big 70
RSA Inferius Prime 30
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Bringing It All Together 50
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Diffie-Hellman Deriving Symmetric Keys 40
Mathematics Successive Powers 60
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 Square Eyes 35
RSA Manyprime 40
RSA Monoprime 30
RSA Factoring 15
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Mathematics Modular Binomials 80
General Lemur XOR 40
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
General Encoding Challenge 40
Introduction Network Attacks 5
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
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 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
General Base64 10
General Hex 5
General ASCII 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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