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Solved Challenges

CTF Archive C0ll1d3r (Firebird Internal CTF) 0
CTF Archive FaILProof Revenge (SekaiCTF) 0
CTF Archive FaILProof (SekaiCTF) 0
CTF Archive Unbalanced (ICC Athens) 0
CTF Archive Key Backup Service 1 (HKCERT CTF) 0
CTF Archive 1337crypt (DownUnderCTF) 0
Lattices Nativity 60
Lattices Too Many Errors 100
Lattices Missing Modulus 80
Elliptic Curves Double and Broken 50
Elliptic Curves Real Curve Crypto 200
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Megalomaniac 2 120
Crypto on the Web Megalomaniac 3 120
Crypto on the Web Megalomaniac 1 100
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
CTF Archive Substitution Cipher III (DownUnderCTF) 0
CTF Archive Twist and Shout (Zh3r0 CTF V2) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive Hide and seek (ECSC 2023 (Norway)) 0
CTF Archive Blind (ECSC 2023 (Norway)) 0
CTF Archive Oofbleck (Firebird Internal CTF) 0
Hash Functions WOTS Up 75
Hash Functions WOTS Up 2 90
CTF Archive Sratslla SEA (HKCERT CTF) 0
CTF Archive Cipher Mode Picker (HKCERT CTF) 0
Crypto on the Web RSA or HMAC? Part 2 100
Elliptic Curves Background Reading 5
Misc Nothing Up My Sleeve 150
Misc Lo-Hi Card Game 120
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE Intro 10
Lattices Noise Free 40
Lattices LWE High Bits Message 15
Lattices LWE Background 5
Elliptic Curves Edwards Goes Degenerate 100
Hash Functions Twin Keys 100
Hash Functions MDFlag 125
Hash Functions Mixed Up 120
Hash Functions Invariant 250
Misc No Leaks 100
Symmetric Ciphers Beatboxer 150
Symmetric Ciphers Dancing Queen 120
Symmetric Ciphers Oh SNAP 120
Misc Bit by Bit 100
Misc Toshi's Treasure 150
Misc RSA vs RNG 150
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive Signature (TSJ CTF) 0
Misc Jeff's LFSR 150
CTF Archive Real Mersenne (Zh3r0 CTF V2) 0
Hash Functions No Difference 175
CTF Archive 1337crypt v2 (DownUnderCTF) 0
CTF Archive Unimplemented (TETCTF) 0
CTF Archive pekobot (AIS3 Pre-Exam) 0
Misc Trust Games 150
Misc L-Win 120
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
Elliptic Curves No Random, No Bias 120
Elliptic Curves Digestive 60
Crypto on the Web RSA or HMAC? 35
Elliptic Curves Montgomery's Ladder 40
Crypto on the Web JWT Sessions 10
Diffie-Hellman The Matrix Revolutions 125
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Additive 70
Diffie-Hellman Static Client 2 120
Diffie-Hellman The Matrix Reloaded 100
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Triple DES 60
Mathematics Cofactor Cofantasy 150
Mathematics Roll your Own 125
Mathematics Real Eisenstein 150
Mathematics Successive Powers 60
Lattices Find the Lattice 100
RSA Let's Decrypt Again 175
RSA Let's Decrypt 80
Hash Functions PriMeD5 100
Hash Functions MD0 80
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web No Way JOSE 20
Crypto on the Web JSON in JSON 40
Crypto on the Web JWT Secrets 25
Symmetric Ciphers Stream of Consciousness 80
Diffie-Hellman Script Kiddie 70
Diffie-Hellman The Matrix 75
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Forbidden Fruit 150
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Symmetric Ciphers Modes of Operation Starter 15
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB Oracle 60
Mathematics Prime and Prejudice 200
Lattices Backpack Cryptography 120
Elliptic Curves Point Negation 10
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Bringing It All Together 50
Symmetric Ciphers Diffusion through Permutation 30
Elliptic Curves Curveball 100
Elliptic Curves ProSign 3 100
Misc Armory 100
Hash Functions Collider 50
Hash Functions Hash Stuffing 50
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
RSA Fast Primes 75
Symmetric Ciphers Passwords as Keys 50
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 Ellipse Curve Cryptography 125
Mathematics No Way Back Home 100
Mathematics Adrien's Signs 80
Lattices Gaussian Reduction 50
Mathematics Modular Binomials 80
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Mathematics Broken RSA 100
Mathematics Unencryptable 125
Lattices Vectors 10
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Mathematics Quadratic Residues 25
General Lemur XOR 40
General Transparency 50
General SSH Keys 35
General CERTainly not 30
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 Encoding Challenge 40
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 Network Attacks 5
Introduction Great Snakes 3
Introduction Finding Flags 2
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
CTF Archive d-phi-enc (HackTM CTF) 0
Elliptic Curves Moving Problems 150
Elliptic Curves Elliptic Nodes 150
Crypto on the Web Token Appreciation 5
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
RSA Null or Never 100
RSA Blinding Light 120
RSA Vote for Pedro 150
RSA Bespoke Padding 100
RSA Endless Emails 150
Misc Gotta Go Fast 40
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
RSA Signing Server 60
RSA RSA Backdoor Viability 175
RSA Ron was Wrong, Whit is Right 90
RSA Marin's Secrets 50
RSA Infinite Descent 50
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 Public Keys 15
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Modular Exponentiation 10

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