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Solved Challenges

Symmetric Ciphers Forbidden Fruit 150
Crypto on the Web Decrypting TLS 1.3 35
Mathematics Ellipse Curve Cryptography 125
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Curveball 100
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web RSA or HMAC? Part 2 100
Crypto on the Web Saying Hello 20
Mathematics Prime and Prejudice 200
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 Smooth Criminal 60
Mathematics Real Eisenstein 150
Mathematics Cofactor Cofantasy 150
Mathematics Unencryptable 125
Mathematics Roll your Own 125
Mathematics No Way Back Home 100
RSA Signing Server 60
RSA Blinding Light 120
RSA Null or Never 100
RSA Bespoke Padding 100
Diffie-Hellman The Matrix Reloaded 100
Diffie-Hellman The Matrix 75
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Static Client 2 120
Diffie-Hellman Additive 70
Diffie-Hellman Static Client 100
Hash Functions Mixed Up 120
Hash Functions No Difference 175
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Mathematics Broken RSA 100
Symmetric Ciphers Triple DES 60
Crypto on the Web JSON in JSON 40
Crypto on the Web RSA or HMAC? 35
Misc Bruce Schneier's Password 100
Misc Armory 100
Misc Bit by Bit 100
Misc Trust Games 150
Misc Lo-Hi Card Game 120
Misc No Leaks 100
Misc Gotta Go Fast 40
Hash Functions MD0 80
Hash Functions Twin Keys 100
Hash Functions PriMeD5 100
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
RSA Vote for Pedro 150
RSA Let's Decrypt Again 175
RSA Let's Decrypt 80
RSA RSA Backdoor Viability 175
RSA Ron was Wrong, Whit is Right 90
RSA Fast Primes 75
RSA Endless Emails 150
Symmetric Ciphers Dancing Queen 120
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers CTRIME 70
Diffie-Hellman Export-grade 100
Elliptic Curves Efficient Exchange 50
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Lazy CBC 60
RSA Marin's Secrets 50
Elliptic Curves Curves and Logs 40
Diffie-Hellman Parameter Injection 60
RSA Infinite Descent 50
Symmetric Ciphers Symmetry 50
Mathematics Modular Binomials 80
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Lattices Gaussian Reduction 50
Mathematics Successive Powers 60
RSA Crossed Wires 100
Symmetric Ciphers Flipping Cookie 60
Lattices Gram Schmidt 30
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Secrets 25
Elliptic Curves Point Negation 10
Symmetric Ciphers ECB CBC WTF 55
Lattices What's a Lattice? 40
Mathematics Adrien's Signs 80
Symmetric Ciphers ECB Oracle 60
General SSH Keys 35
RSA Everything is Big 70
RSA Everything is Still Big 100
Diffie-Hellman Deriving Symmetric Keys 40
Elliptic Curves Background Reading 5
Symmetric Ciphers Bringing It All Together 50
Crypto on the Web JWT Sessions 10
Symmetric Ciphers Passwords as Keys 50
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Computing Public Values 25
Crypto on the Web Token Appreciation 5
Lattices Size and Basis 15
Lattices Vectors 10
RSA Modulus Inutilis 50
RSA Square Eyes 35
Symmetric Ciphers Diffusion through Permutation 30
RSA Manyprime 40
General Transparency 50
Diffie-Hellman Working with Fields 10
RSA Salty 20
RSA Inferius Prime 30
Symmetric Ciphers Confusion through Substitution 25
Symmetric Ciphers Modes of Operation Starter 15
RSA Monoprime 30
Mathematics Modular Square Root 35
Symmetric Ciphers Round Keys 20
RSA RSA Signatures 25
Symmetric Ciphers Structure of AES 15
RSA Factoring 15
Mathematics Chinese Remainder Theorem 40
Mathematics Legendre Symbol 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
RSA RSA Decryption 20
RSA Private Keys 20
Symmetric Ciphers Resisting Bruteforce 10
RSA Euler's Totient 20
Symmetric Ciphers Keyed Permutations 5
Mathematics Quadratic Residues 25
RSA Public Keys 15
RSA Modular Exponentiation 10
General Lemur XOR 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Extended GCD 20
General Modular Arithmetic 1 20
General Encoding Challenge 40
General You either know, XOR you don't 30
General Greatest Common Divisor 15
General XOR Properties 15
General Favourite byte 20
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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