cedric013

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Solved Challenges

CTF Archive Key Backup Service 1 (HKCERT CTF) 0
CTF Archive Cipher Mode Picker (HKCERT CTF) 0
CTF Archive Ticket Maestro (CryptoHack) 0
CTF Archive Hamiltonicity (CryptoHack) 0
CTF Archive OR Proof (CryptoHack) 0
CTF Archive pekobot (AIS3 Pre-Exam) 0
CTF Archive ed25519 magic (ICC Athens) 0
CTF Archive Do you have good eyes? (Breizh CTF) 0
RSA Let's Decrypt Again 175
RSA Vote for Pedro 150
RSA Blinding Light 120
RSA Let's Decrypt 80
RSA Signing Server 60
RSA Null or Never 100
RSA Bespoke Padding 100
RSA RSA Backdoor Viability 175
RSA Ron was Wrong, Whit is Right 90
RSA Endless Emails 150
General Encoding Challenge 40
Symmetric Ciphers Beatboxer 150
Symmetric Ciphers Paper Plane 120
Symmetric Ciphers Rhetorical Oracle 2 150
Symmetric Ciphers Oracular Spectacular 150
Symmetric Ciphers The Good, The Pad, The Ugly 100
Symmetric Ciphers Rhetorical Oracle 100
Symmetric Ciphers Pad Thai 80
Symmetric Ciphers Oh SNAP 120
Symmetric Ciphers Forbidden Fruit 150
Diffie-Hellman The Matrix Reloaded 100
Diffie-Hellman The Matrix Revolutions 125
Diffie-Hellman Static Client 2 120
Diffie-Hellman Static Client 100
Diffie-Hellman Additive 70
Diffie-Hellman Script Kiddie 70
Diffie-Hellman The Matrix 75
Symmetric Ciphers Dancing Queen 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
Introduction Network Attacks 5
CTF Archive Authentification 2 (Breizh CTF) 0
CTF Archive Authentification 1 (Breizh CTF) 0
CTF Archive Sus (ImaginaryCTF) 0
CTF Archive Blind (ECSC 2023 (Norway)) 0
CTF Archive Tenet: The Plagarism (HKCERT CTF) 0
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
CTF Archive Verilicious (Cyber Apocalypse 2025) 0
CTF Archive U-turn (Breizh CTF) 0
CTF Archive 1337crypt v2 (DownUnderCTF) 0
CTF Archive Unimplemented (TETCTF) 0
CTF Archive Substitution Cipher III (DownUnderCTF) 0
CTF Archive Oofbleck (Firebird Internal CTF) 0
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive kaitenzushi (HackTM CTF) 0
CTF Archive Functional (ICC Athens) 0
CTF Archive Signature (TSJ CTF) 0
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
CTF Archive Put a ring on it (ECSC 2023 (Norway)) 0
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
CTF Archive Irish flan (ECSC 2023 (Norway)) 0
CTF Archive Hide and seek (ECSC 2023 (Norway)) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive d-phi-enc (HackTM CTF) 0
CTF Archive 1337crypt (DownUnderCTF) 0
Lattices Missing Modulus 80
Lattices Noise Cheap 90
Lattices Too Many Errors 100
Lattices Noise Free 40
Lattices Backpack Cryptography 120
Lattices Bounded Noise 50
Lattices Nativity 60
Mathematics Cofactor Cofantasy 150
Mathematics Prime and Prejudice 200
Mathematics Ellipse Curve Cryptography 125
Mathematics Real Eisenstein 150
Mathematics Unencryptable 125
Mathematics No Way Back Home 100
Mathematics Common Ground 75
Mathematics Broken RSA 100
Mathematics Successive Powers 60
Lattices From Private to Public Key LWE 25
Lattices LWE Low Bits Message 20
Lattices LWE High Bits Message 15
Lattices LWE Intro 10
Lattices LWE Background 5
Lattices Find the Lattice 100
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Authenticated Handshake 40
Crypto on the Web Decrypting TLS 1.3 35
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
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
Hash Functions MD0 80
Hash Functions Long Story Short 60
Hash Functions Seventy-Two 50
Hash Functions No Difference 175
Hash Functions Hash Stuffing 50
Hash Functions Collider 50
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
General Transparency 50
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Lemur XOR 40
Diffie-Hellman Parameter Injection 60
Diffie-Hellman Export-grade 100
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
RSA Fast Primes 75
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 Square Eyes 35
RSA Inferius Prime 30
Elliptic Curves Moving Problems 150
Elliptic Curves Smooth Criminal 60
Elliptic Curves Montgomery's Ladder 40
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 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 Modulus Inutilis 50
RSA Salty 20
RSA Manyprime 40
RSA Monoprime 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
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 Modular Binomials 80
Mathematics Adrien's Signs 80
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
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
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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