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Submitted Solutions

Missing Modulus 2
Hash Stuffing 12
Bruce Schneier's Password: Part 2 4
RSA Backdoor Viability 48
Invariant 19
Everything is Still Big 51
Ellipse Curve Cryptography 35
Moving Problems 40
Real Eisenstein 16
Elliptic Nodes 25
Exceptional Curves 52

Solved Challenges

Isogenies Composite Isogenies 60
Isogenies Three Isogenies 35
Isogenies Two Isogenies 30
ZKPs Too Honest 50
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Pairing-Based Cryptography 50
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
Lattices Bounded Noise 50
Hash Functions Merkle Trees 25
Elliptic Curves An Evil Twisted Mind 175
Elliptic Curves An Exceptional Twisted Mind 125
Elliptic Curves A Twisted Mind 80
ZKPs ZKP Introduction 5
Elliptic Curves Checkpoint 150
Symmetric Ciphers Oracular Spectacular 150
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
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
Lattices Missing Modulus 80
Crypto on the Web Megalomaniac 3 120
Crypto on the Web Megalomaniac 2 120
Crypto on the Web Megalomaniac 1 100
Crypto on the Web Authenticated Handshake 40
Lattices Noise Cheap 90
Lattices Nativity 60
Lattices Noise Free 40
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Elliptic Curves Digestive 60
Lattices LWE Intro 10
Lattices LWE Background 5
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Misc RSA vs RNG 150
Hash Functions MDFlag 125
Elliptic Curves Real Curve Crypto 200
Symmetric Ciphers Beatboxer 150
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
Mathematics No Way Back Home 100
Elliptic Curves Montgomery's Ladder 40
Diffie-Hellman The Matrix Revolutions 125
Mathematics Roll your Own 125
Crypto on the Web RSA or HMAC? Part 2 100
Symmetric Ciphers Dancing Queen 120
Diffie-Hellman The Matrix Reloaded 100
Diffie-Hellman The Matrix 75
Hash Functions Hash Stuffing 50
Elliptic Curves Double and Broken 50
General SSH Keys 35
Misc Bruce Schneier's Password: Part 2 250
Misc L-Win 120
Symmetric Ciphers Oh SNAP 120
Misc Bruce Schneier's Password 100
Crypto on the Web JSON in JSON 40
Hash Functions Mixed Up 120
Misc Jeff's LFSR 150
Symmetric Ciphers Logon Zero 80
Crypto on the Web RSA or HMAC? 35
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
RSA RSA Backdoor Viability 175
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Mathematics Cofactor Cofantasy 150
Hash Functions Invariant 250
Hash Functions Twin Keys 100
Misc Trust Games 150
RSA Let's Decrypt Again 175
Elliptic Curves Edwards Goes Degenerate 100
General Transparency 50
Hash Functions No Difference 175
Hash Functions PriMeD5 100
Elliptic Curves No Random, No Bias 120
RSA Let's Decrypt 80
Mathematics Ellipse Curve Cryptography 125
Hash Functions MD0 80
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Triple DES 60
Lattices Too Many Errors 100
Hash Functions Collider 50
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Mathematics Unencryptable 125
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Symmetric Ciphers Paper Plane 120
Misc Nothing Up My Sleeve 150
Mathematics Broken RSA 100
Mathematics Real Eisenstein 150
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
Mathematics Modular Square Root 35
RSA Bespoke Padding 100
Elliptic Curves Moving Problems 150
Mathematics Prime and Prejudice 200
Misc Toshi's Treasure 150
General XOR Properties 15
Mathematics Quadratic Residues 25
Mathematics Legendre Symbol 35
Diffie-Hellman Static Client 2 120
RSA Crossed Wires 100
Elliptic Curves Elliptic Nodes 150
Misc Armory 100
Misc Lo-Hi Card Game 120
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
General Encoding Challenge 40
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
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
RSA Vote for Pedro 150
RSA Endless Emails 150
Elliptic Curves Curveball 100
Elliptic Curves Micro Transmissions 120
RSA Everything is Still Big 100
Misc Bit by Bit 100
RSA Blinding Light 120
RSA Signing Server 60
RSA Ron was Wrong, Whit is Right 90
Misc No Leaks 100
Misc Gotta Go Fast 40
RSA Null or Never 100
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA RSA Signatures 25
General Lemur XOR 40
Mathematics Modular Binomials 80
Mathematics Successive Powers 60
Mathematics Adrien's Signs 80
General CERTainly not 30
RSA Inferius Prime 30
Elliptic Curves Exceptional Curves 100
Elliptic Curves Smooth Criminal 60
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Diffie-Hellman Additive 70
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 Everything is Big 70
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Factoring 15
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Elliptic Curves Background Reading 5
Elliptic Curves ProSign 3 100
General You either know, XOR you don't 30
General Favourite byte 20
General Privacy-Enhanced Mail? 25
Mathematics Chinese Remainder Theorem 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
General XOR Starter 10
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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