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Solved Challenges

Misc Trust Games 150
Diffie-Hellman The Matrix Reloaded 100
Misc Bruce Schneier's Password 100
Misc Jeff's LFSR 150
Mathematics Prime and Prejudice 200
Symmetric Ciphers Forbidden Fruit 150
RSA Ron was Wrong, Whit is Right 90
Elliptic Curves Montgomery's Ladder 40
Diffie-Hellman The Matrix 75
Hash Functions Mixed Up 120
Elliptic Curves Moving Problems 150
Mathematics Cofactor Cofantasy 150
Hash Functions Twin Keys 100
RSA Null or Never 100
Elliptic Curves No Random, No Bias 120
Elliptic Curves ProSign 3 100
Misc L-Win 120
Hash Functions PriMeD5 100
Hash Functions MD0 80
Hash Functions Hash Stuffing 50
Misc Nothing Up My Sleeve 150
Hash Functions Collider 50
Misc No Leaks 100
Misc Gotta Go Fast 40
Misc Lo-Hi Card Game 120
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Micro Transmissions 120
Mathematics Backpack Cryptography 120
Elliptic Curves Curveball 100
Misc Bit by Bit 100
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
RSA RSA Backdoor Viability 175
Diffie-Hellman Static Client 2 120
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Modes of Operation Starter 15
Mathematics Unencryptable 125
Mathematics Ellipse Curve Cryptography 125
Elliptic Curves Exceptional Curves 100
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Elliptic Curves Smooth Criminal 60
Misc Toshi's Treasure 150
Misc Armory 100
General Transparency 50
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
General SSH Keys 35
General CERTainly not 30
Diffie-Hellman Script Kiddie 70
Mathematics Find the Lattice 100
Diffie-Hellman Static Client 100
Mathematics Roll your Own 90
Mathematics Gaussian Reduction 50
Mathematics What's a Lattice? 40
Mathematics Gram Schmidt 30
RSA Vote for Pedro 150
Mathematics Broken RSA 100
Mathematics Modular Binomials 80
RSA Bespoke Padding 100
RSA Endless Emails 150
RSA Blinding Light 120
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Additive 70
Diffie-Hellman Diffie-Hellman Starter 5 40
Diffie-Hellman Diffie-Hellman Starter 4 30
Diffie-Hellman Diffie-Hellman Starter 3 20
Diffie-Hellman Diffie-Hellman Starter 2 20
Diffie-Hellman Diffie-Hellman Starter 1 10
General Privacy-Enhanced Mail? 25
RSA Fast Primes 75
RSA Everything is Still Big 100
Mathematics Adrien's Signs 80
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
RSA Let's Decrypt 80
RSA Signing Server 60
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Crossed Wires 100
RSA Everything is Big 70
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 Starter 6 25
RSA RSA Starter 5 20
RSA RSA Starter 4 20
RSA RSA Starter 3 20
RSA RSA Starter 2 15
RSA RSA Starter 1 10
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Mathematics Successive Powers 60
Mathematics Modular Square Root 35
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
Mathematics Chinese Remainder Theorem 40
Mathematics Size and Basis 15
Mathematics Vectors 10
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 Lemur XOR 40
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General XOR Starter 10
General Encoding Challenge 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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