Mengel

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Solved Challenges

Misc Bit by Bit 100
Misc Toshi's Treasure 150
Hash Functions MDFlag 125
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Hash Functions Mixed Up 120
Hash Functions Hash Stuffing 50
Crypto on the Web Decrypting TLS 1.2 30
Misc Lo-Hi Card Game 120
Misc No Leaks 100
Misc Gotta Go Fast 40
Hash Functions MD0 80
Hash Functions PriMeD5 100
Hash Functions Collider 50
Hash Functions No Difference 175
Crypto on the Web JWT Secrets 25
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
Mathematics Backpack Cryptography 120
Mathematics Gaussian Reduction 50
Mathematics What's a Lattice? 40
Mathematics Size and Basis 15
Mathematics Gram Schmidt 30
Elliptic Curves Moving Problems 150
Elliptic Curves Digestive 60
RSA Let's Decrypt Again 175
RSA Let's Decrypt 80
Mathematics Prime and Prejudice 200
Mathematics Real Eisenstein 150
Mathematics Unencryptable 125
Mathematics Roll your Own 125
Post-Quantum Too Many Errors 100
Post-Quantum Missing Modulus 80
Post-Quantum Nativity 60
Post-Quantum Noise Free 40
Post-Quantum From Private to Public Key LWE 25
RSA Vote for Pedro 150
RSA Blinding Light 120
RSA Signing Server 60
Elliptic Curves Curveball 100
RSA Null or Never 100
RSA Bespoke Padding 100
RSA RSA Backdoor Viability 175
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
Crypto on the Web No Way JOSE 20
Crypto on the Web JSON in JSON 40
Elliptic Curves Elliptic Nodes 150
Diffie-Hellman The Matrix Revolutions 125
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
RSA Endless Emails 150
Mathematics Ellipse Curve Cryptography 125
Mathematics No Way Back Home 100
Mathematics Broken RSA 100
Mathematics Cofactor Cofantasy 150
Mathematics Successive Powers 60
RSA Ron was Wrong, Whit is Right 90
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
RSA Everything is Still Big 100
RSA Crossed Wires 100
RSA Everything is Big 70
General SSH Keys 35
Post-Quantum LWE Low Bits Message 20
Post-Quantum LWE High Bits Message 15
Symmetric Ciphers Oh SNAP 120
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Transparency 50
Symmetric Ciphers Dancing Queen 120
Elliptic Curves Edwards Goes Degenerate 100
Mathematics Vectors 10
Mathematics Modular Square Root 35
Mathematics Find the Lattice 100
Elliptic Curves Double and Broken 50
Elliptic Curves Micro Transmissions 120
Elliptic Curves Exceptional Curves 100
Elliptic Curves Smooth Criminal 60
Elliptic Curves Efficient Exchange 50
Elliptic Curves Curves and Logs 40
Elliptic Curves Scalar Multiplication 35
Elliptic Curves Point Addition 30
Elliptic Curves Point Negation 10
Elliptic Curves Background Reading 5
General Lemur XOR 40
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
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
RSA Inferius Prime 30
RSA Square Eyes 35
RSA Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Monoprime 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
General Encoding Challenge 40
Introduction Network Attacks 5
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers ECB Oracle 60
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 Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
Post-Quantum LWE Intro 10
Post-Quantum LWE Background 5
General You either know, XOR you don't 30
General Favourite byte 20
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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