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Solved Challenges

Mathematics No Way Back Home 100
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Saying Hello 20
Crypto on the Web Secure Protocols 5
Diffie-Hellman The Matrix 75
RSA Endless Emails 150
Symmetric Ciphers Dancing Queen 120
Hash Functions Invariant 250
Hash Functions No Difference 175
Misc Bruce Schneier's Password 100
Elliptic Curves Edwards Goes Degenerate 100
Elliptic Curves Micro Transmissions 120
Elliptic Curves Smooth Criminal 60
Elliptic Curves Elliptic Nodes 150
Elliptic Curves No Random, No Bias 120
Misc Jeff's LFSR 150
Misc L-Win 120
Mathematics Backpack Cryptography 120
Mathematics Real Eisenstein 150
Mathematics Find the Lattice 100
Mathematics Modular Binomials 80
Misc Gotta Go Fast 40
Introduction Network Attacks 5
Mathematics Ellipse Curve Cryptography 125
Crypto on the Web JWT Secrets 25
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
RSA Everything is Big 70
Crypto on the Web JSON in JSON 40
Crypto on the Web JWT Sessions 10
Crypto on the Web No Way JOSE 20
Crypto on the Web Token Appreciation 5
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Mathematics Gaussian Reduction 50
Mathematics Gram Schmidt 30
RSA Infinite Descent 50
RSA Crossed Wires 100
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Diffusion through Permutation 30
Symmetric Ciphers Confusion through Substitution 25
Misc Armory 100
Misc Bit by Bit 100
Mathematics Broken RSA 100
Mathematics Modular Square Root 35
Mathematics What's a Lattice? 40
Mathematics Legendre Symbol 35
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Paper Plane 120
Mathematics Unencryptable 125
RSA Null or Never 100
RSA RSA Starter 5 20
RSA RSA Starter 4 20
RSA Manyprime 40
RSA Inferius Prime 30
RSA Marin's Secrets 50
Diffie-Hellman Diffie-Hellman Starter 5 40
Diffie-Hellman Script Kiddie 70
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Bean Counter 60
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
Diffie-Hellman Diffie-Hellman Starter 4 30
Diffie-Hellman Diffie-Hellman Starter 3 20
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Extended GCD 20
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Lemur XOR 40
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Round Keys 20
Symmetric Ciphers Structure of AES 15
Symmetric Ciphers Resisting Bruteforce 10
Mathematics Vectors 10
RSA Square Eyes 35
RSA Monoprime 30
RSA Modulus Inutilis 50
RSA Salty 20
RSA Factoring 15
General Base64 10
General Greatest Common Divisor 15
General Bytes and Big Integers 10
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Triple DES 60
Mathematics Quadratic Residues 25
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Modes of Operation Starter 15
RSA RSA Starter 3 20
RSA RSA Starter 2 15
RSA RSA Starter 1 10
Diffie-Hellman Diffie-Hellman Starter 2 20
Diffie-Hellman Diffie-Hellman Starter 1 10
Mathematics Size and Basis 15
Symmetric Ciphers Keyed Permutations 5
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
General Hex 5
Mathematics Successive Powers 60
General ASCII 5
General XOR Starter 10
Introduction Great Snakes 3
Introduction Finding Flags 2

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