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Solved Challenges

ZKPs Hamiltonicity 2 175
ZKPs Hamiltonicity 1 100
ZKPs OR Proof 75
Hash Functions Mixed Up 120
Hash Functions MDFlag 125
Symmetric Ciphers Stream of Consciousness 80
General Transparency 50
Isogenies Better than Linear 85
Isogenies CSIDH Key Exchange 90
Isogenies Abelian SIDH 90
Elliptic Curves Edwards Goes Degenerate 100
Elliptic Curves No Random, No Bias 120
Elliptic Curves Curveball 100
Elliptic Curves Elliptic Nodes 150
Mathematics Ellipse Curve Cryptography 125
Mathematics Roll your Own 125
Mathematics Unencryptable 125
Lattices Noise Cheap 90
Symmetric Ciphers CTRIME 70
CTF Archive Authentification 2 (Breizh CTF) 0
CTF Archive Authentification 1 (Breizh CTF) 0
CTF Archive 1337crypt (DownUnderCTF) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive U-turn (Breizh CTF) 0
Misc RSA vs RNG 150
Lattices Too Many Errors 100
Lattices Missing Modulus 80
RSA Endless Emails 150
RSA Vote for Pedro 150
RSA Blinding Light 120
Symmetric Ciphers Forbidden Fruit 150
Diffie-Hellman Static Client 2 120
RSA Null or Never 100
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
Misc Lo-Hi Card Game 120
Misc Trust Games 150
Misc Jeff's LFSR 150
Misc L-Win 120
Symmetric Ciphers Logon Zero 80
Misc Bruce Schneier's Password 100
Misc Bit by Bit 100
Misc Armory 100
ZKPs Mister Saplin's Preview 80
ZKPs Couples 100
Elliptic Curves Exceptional Curves 100
Diffie-Hellman Export-grade 100
Diffie-Hellman The Matrix 75
Diffie-Hellman Static Client 100
RSA Let's Decrypt 80
RSA Bespoke Padding 100
RSA Ron was Wrong, Whit is Right 90
RSA Crossed Wires 100
RSA Manyprime 40
RSA Inferius Prime 30
Mathematics No Way Back Home 100
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Saying Hello 20
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Lattices From Private to Public Key LWE 25
ZKPs Pairing-Based Cryptography 50
Isogenies Dual Masters 90
Hash Functions Merkle Trees 25
Elliptic Curves ProSign 3 100
Elliptic Curves Digestive 60
Elliptic Curves Montgomery's Ladder 40
Isogenies André Encoding 80
Isogenies What's My Kernel 70
Isogenies DLOG on the Surface 40
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Elliptic Curves Double and Broken 50
Mathematics Broken RSA 100
CTF Archive Leet Universe (ImaginaryCTF (Daily)) 0
Misc No Leaks 100
Isogenies Twisted CSIDH Isogenies 70
Isogenies Secret Exponents 60
Isogenies SIDH Key Exchange 80
Lattices Nativity 60
Lattices Bounded Noise 50
Crypto on the Web RSA or HMAC? Part 2 100
Hash Functions MD0 80
Hash Functions No Difference 175
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
Elliptic Curves Smooth Criminal 60
Diffie-Hellman Additive 70
Diffie-Hellman Parameter Injection 60
RSA Marin's Secrets 50
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Passwords as Keys 50
ZKPs Too Honest 50
Lattices Noise Free 40
Diffie-Hellman Script Kiddie 70
RSA Signing Server 60
RSA Everything is Big 70
RSA Infinite Descent 50
RSA Factoring 15
Isogenies Prime Power Isogenies 50
Isogenies Special Isogenies 30
Isogenies Composite Isogenies 60
Isogenies Three Isogenies 35
Isogenies Two Isogenies 30
Isogenies Montgomery Curves 30
Isogenies Where's the Supersingular Curve 25
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
Isogenies Introduction to Isogenies 10
Elliptic Curves Background Reading 5
ZKPs ZKP Introduction 5
Crypto on the Web Secure Protocols 5
Crypto on the Web JWT Sessions 10
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
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Lattices LWE Intro 10
Lattices LWE Background 5
Crypto on the Web Token Appreciation 5
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Misc Gotta Go Fast 40
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Elliptic Curves Curves and Logs 40
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Computing Public Values 25
RSA Modulus Inutilis 50
RSA Salty 20
RSA Square Eyes 35
RSA Monoprime 30
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
Elliptic Curves Efficient Exchange 50
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Isogenies Image Point Arithmetic 30
Isogenies The j-invariant 20
Lattices Gaussian Reduction 50
Lattices Gram Schmidt 30
Lattices What's a Lattice? 40
Lattices Size and Basis 15
Lattices Vectors 10
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Working with Fields 10
Mathematics Successive Powers 60
Mathematics Chinese Remainder Theorem 40
Mathematics Quadratic Residues 25
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
General Lemur XOR 40
General SSH Keys 35
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 Favourite byte 20
General XOR Properties 15
General XOR Starter 10
General Encoding Challenge 40
General Bytes and Big Integers 10
General You either know, XOR you don't 30
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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