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Submitted Solutions

ProSign 3 2
Static Client 2 10

Solved Challenges

Hash Functions Twin Keys 100
Elliptic Curves Curveball 100
Elliptic Curves ProSign 3 100
Misc Armory 100
RSA Bespoke Padding 100
Lattices Backpack Cryptography 120
Lattices Find the Lattice 100
Elliptic Curves Exceptional Curves 100
Elliptic Curves No Random, No Bias 120
RSA Null or Never 100
Hash Functions No Difference 175
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Logon Zero 80
Elliptic Curves Smooth Criminal 60
Crypto on the Web Authenticated Handshake 40
Crypto on the Web RSA or HMAC? Part 2 100
Crypto on the Web RSA or HMAC? 35
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 Secure Protocols 5
Crypto on the Web Sharks on the Wire 10
Crypto on the Web JSON in JSON 40
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
Crypto on the Web JWT Sessions 10
Hash Functions PriMeD5 100
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Hash Functions MD0 80
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
Mathematics Modular Binomials 80
Crypto on the Web Token Appreciation 5
General Encoding Challenge 40
RSA Ron was Wrong, Whit is Right 90
RSA Let's Decrypt 80
RSA Signing Server 60
RSA Blinding Light 120
Elliptic Curves Point Negation 10
Misc No Leaks 100
Misc Gotta Go Fast 40
Elliptic Curves Background Reading 5
Mathematics Adrien's Signs 80
Mathematics Broken RSA 100
Mathematics Successive Powers 60
Diffie-Hellman Script Kiddie 70
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Symmetric Ciphers CTRIME 70
Mathematics Modular Square Root 35
Lattices Vectors 10
Diffie-Hellman Static Client 2 120
Diffie-Hellman Additive 70
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Hash Functions Jack's Birthday Confusion 30
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
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Hash Functions Jack's Birthday Hash 20
Symmetric Ciphers Triple DES 60
General Extended GCD 20
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers ECB CBC WTF 55
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
RSA Marin's Secrets 50
RSA Infinite Descent 50
Mathematics Chinese Remainder Theorem 40
RSA Endless Emails 150
RSA Everything is Still Big 100
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 Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Mathematics Legendre Symbol 35
Introduction Network Attacks 5
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General You either know, XOR you don't 30
General Privacy-Enhanced Mail? 25
Mathematics Quadratic Residues 25
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Favourite byte 20
General Lemur XOR 40
General Greatest Common Divisor 15
General XOR Properties 15
General XOR Starter 10
General Bytes and Big Integers 10
General Base64 10
General Hex 5
General ASCII 5
Introduction Great Snakes 3
Introduction Finding Flags 2

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