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Solved Challenges

Symmetric Ciphers Oh SNAP 120
Symmetric Ciphers Dancing Queen 120
Symmetric Ciphers Paper Plane 120
CTF Archive Additional problems (CSC Belgium) 0
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Pad Thai 80
Elliptic Curves Exceptional Curves 100
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Smooth Criminal 60
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Lattices Gaussian Reduction 50
Lattices Gram Schmidt 30
Lattices What's a Lattice? 40
Lattices Size and Basis 15
Hash Functions PriMeD5 100
Hash Functions Hash Stuffing 50
Diffie-Hellman Script Kiddie 70
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Mathematics No Way Back Home 100
Hash Functions Mixed Up 120
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
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
Hash Functions MD0 80
Mathematics Prime and Prejudice 200
Mathematics Successive Powers 60
Mathematics Broken RSA 100
RSA Let's Decrypt 80
Lattices Vectors 10
RSA Bespoke Padding 100
RSA Null or Never 100
RSA RSA Backdoor Viability 175
RSA Fast Primes 75
RSA Ron was Wrong, Whit is Right 90
RSA Everything is Still Big 100
RSA Marin's Secrets 50
Elliptic Curves Efficient Exchange 50
Symmetric Ciphers Logon Zero 80
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Crypto on the Web JWT Sessions 10
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Diffie-Hellman Additive 70
Mathematics Modular Binomials 80
RSA Blinding Light 120
Symmetric Ciphers Triple DES 60
General SSH Keys 35
RSA Vote for Pedro 150
Hash Functions Collider 50
RSA Signing Server 60
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Computing Shared Secrets 30
Diffie-Hellman Generators of Groups 20
Diffie-Hellman Computing Public Values 25
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web Token Appreciation 5
Hash Functions Jack's Birthday Hash 20
Hash Functions Jack's Birthday Confusion 30
Symmetric Ciphers Stream of Consciousness 80
Misc No Leaks 100
Misc Gotta Go Fast 40
Elliptic Curves Background Reading 5
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
Diffie-Hellman Working with Fields 10
Mathematics Adrien's Signs 80
Mathematics Modular Square Root 35
RSA Infinite Descent 50
RSA Crossed Wires 100
RSA Square Eyes 35
RSA Manyprime 40
RSA Monoprime 30
RSA Inferius Prime 30
RSA Endless Emails 150
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
General Transparency 50
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers ECB CBC WTF 55
RSA Factoring 15
RSA Everything is Big 70
Mathematics Chinese Remainder Theorem 40
General CERTainly not 30
RSA Modulus Inutilis 50
RSA Salty 20
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
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
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 Legendre Symbol 35
Mathematics Quadratic Residues 25
General Privacy-Enhanced Mail? 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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