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Solved Challenges

Hash Functions MDFlag 125
Post-Quantum LWE High Bits Message 15
Post-Quantum LWE Intro 10
Post-Quantum LWE Background 5
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Secure Protocols 5
Mathematics No Way Back Home 100
Misc Bruce Schneier's Password 100
Misc Jeff's LFSR 150
Misc Toshi's Treasure 150
Misc Bit by Bit 100
Diffie-Hellman The Matrix 75
RSA Let's Decrypt 80
Symmetric Ciphers Dancing Queen 120
Mathematics Cofactor Cofantasy 150
Post-Quantum Too Many Errors 100
Mathematics Prime and Prejudice 200
Symmetric Ciphers Oh SNAP 120
Hash Functions Jack's Birthday Confusion 30
Hash Functions MD0 80
Misc Armory 100
RSA Bespoke Padding 100
Misc Lo-Hi Card Game 120
Elliptic Curves ProSign 3 100
Elliptic Curves Moving Problems 150
Elliptic Curves Curveball 100
Crypto on the Web RSA or HMAC? 35
Symmetric Ciphers Forbidden Fruit 150
Mathematics Ellipse Curve Cryptography 125
Diffie-Hellman Script Kiddie 70
Misc L-Win 120
Elliptic Curves Elliptic Nodes 150
Hash Functions Hash Stuffing 50
Elliptic Curves Exceptional Curves 100
Elliptic Curves Smooth Criminal 60
Misc No Leaks 100
General SSH Keys 35
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers CTRIME 70
RSA RSA Backdoor Viability 175
Hash Functions Collider 50
Symmetric Ciphers Triple DES 60
RSA Null or Never 100
RSA Blinding Light 120
RSA Signing Server 60
RSA Fast Primes 75
Symmetric Ciphers Stream of Consciousness 80
Misc Gotta Go Fast 40
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
Crypto on the Web Token Appreciation 5
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
Diffie-Hellman Additive 70
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Diffie-Hellman Starter 5 40
Diffie-Hellman Diffie-Hellman Starter 4 30
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Lazy CBC 60
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
RSA Ron was Wrong, Whit is Right 90
Hash Functions Jack's Birthday Hash 20
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Endless Emails 150
RSA Everything is Still Big 100
RSA Crossed Wires 100
Diffie-Hellman Diffie-Hellman Starter 3 20
Diffie-Hellman Diffie-Hellman Starter 2 20
Diffie-Hellman Diffie-Hellman Starter 1 10
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 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
Symmetric Ciphers Structure of AES 15
Mathematics Unencryptable 125
Mathematics Broken RSA 100
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Successive Powers 60
Mathematics Backpack Cryptography 120
Mathematics Find the Lattice 100
Mathematics Gaussian Reduction 50
Mathematics Gram Schmidt 30
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
General Transparency 50
General CERTainly not 30
Mathematics Size and Basis 15
Mathematics Vectors 10
Mathematics What's a Lattice? 40
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Extended GCD 20
General Privacy-Enhanced Mail? 25
Symmetric Ciphers Resisting Bruteforce 10
Symmetric Ciphers Keyed Permutations 5
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 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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