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Submitted Solutions

L-Win 16
Bespoke Padding 17
Nothing Up My Sleeve 7
Smooth Criminal 24
Marin's Secrets 19
Vote for Pedro 30
Crossed Wires 11
ProSign 3 12

Solved Challenges

Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
Misc RSA vs RNG 150
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Lattices LWE Intro 10
Lattices LWE Background 5
Elliptic Curves Digestive 60
Hash Functions Invariant 250
Mathematics Ellipse Curve Cryptography 125
RSA Let's Decrypt 80
Symmetric Ciphers Beatboxer 150
Elliptic Curves Real Curve Crypto 200
Hash Functions MDFlag 125
Mathematics No Way Back Home 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
Elliptic Curves No Random, No Bias 120
RSA Let's Decrypt Again 175
Mathematics Cofactor Cofantasy 150
Symmetric Ciphers Dancing Queen 120
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Logon Zero 80
RSA RSA Backdoor Viability 175
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Elliptic Curves Edwards Goes Degenerate 100
Misc Trust Games 150
Elliptic Curves Double and Broken 50
Elliptic Curves Montgomery's Ladder 40
Mathematics Unencryptable 125
Hash Functions Twin Keys 100
Mathematics Roll your Own 125
Diffie-Hellman The Matrix Revolutions 125
Crypto on the Web RSA or HMAC? Part 2 100
Diffie-Hellman The Matrix Reloaded 100
Diffie-Hellman The Matrix 75
Hash Functions Hash Stuffing 50
General SSH Keys 35
Misc Jeff's LFSR 150
Misc L-Win 120
Hash Functions No Difference 175
Hash Functions Mixed Up 120
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
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Misc Bruce Schneier's Password 100
General Transparency 50
Symmetric Ciphers Oh SNAP 120
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Hash Functions PriMeD5 100
Lattices Too Many Errors 100
Lattices Gaussian Reduction 50
Lattices Gram Schmidt 30
Hash Functions MD0 80
Lattices What's a Lattice? 40
Symmetric Ciphers Triple DES 60
Lattices Size and Basis 15
Lattices Vectors 10
Hash Functions Collider 50
Mathematics Real Eisenstein 150
RSA Bespoke Padding 100
Elliptic Curves Moving Problems 150
Mathematics Broken RSA 100
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 Resisting Bruteforce 10
Symmetric Ciphers Paper Plane 120
Misc Nothing Up My Sleeve 150
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Keyed Permutations 5
Mathematics Modular Square Root 35
Mathematics Prime and Prejudice 200
RSA Vote for Pedro 150
RSA Null or Never 100
Elliptic Curves Elliptic Nodes 150
Diffie-Hellman Static Client 2 120
General XOR Properties 15
RSA Crossed Wires 100
Mathematics Quadratic Residues 25
Misc Toshi's Treasure 150
Mathematics Legendre Symbol 35
Mathematics Modular Binomials 80
RSA Fast Primes 75
RSA Everything is Still Big 100
Elliptic Curves Micro Transmissions 120
Elliptic Curves Exceptional Curves 100
RSA Ron was Wrong, Whit is Right 90
RSA Endless Emails 150
Diffie-Hellman Static Client 100
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
Elliptic Curves Smooth Criminal 60
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Misc Bit by Bit 100
RSA Marin's Secrets 50
RSA Infinite Descent 50
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Script Kiddie 70
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 Signing Server 60
RSA Everything is Big 70
Misc No Leaks 100
Misc Gotta Go Fast 40
Symmetric Ciphers Stream of Consciousness 80
Mathematics Adrien's Signs 80
General Encoding Challenge 40
Misc Armory 100
RSA Blinding Light 120
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 Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Mathematics Successive Powers 60
General Lemur XOR 40
General Extended GCD 20
General You either know, XOR you don't 30
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Symmetry 50
Symmetric Ciphers CTRIME 70
Misc Lo-Hi Card Game 120
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Modes of Operation Starter 15
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Greatest Common Divisor 15
General Favourite byte 20
General XOR Starter 10
Mathematics Chinese Remainder Theorem 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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