halliana

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Solved Challenges

ZKPs Pairing-Based Cryptography 50
RSA Let's Decrypt Again 175
RSA Square Eyes 35
RSA Monoprime 30
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Salty 20
RSA Modulus Inutilis 50
RSA Everything is Big 70
RSA Crossed Wires 100
RSA Everything is Still Big 100
Mathematics Adrien's Signs 80
Mathematics Modular Binomials 80
Mathematics No Way Back Home 100
Mathematics Broken RSA 100
Mathematics Unencryptable 125
Mathematics Ellipse Curve Cryptography 125
Mathematics Real Eisenstein 150
Isogenies Three Isogenies 35
Misc Lo-Hi Card Game 120
Isogenies Two Isogenies 30
Crypto on the Web JWT Sessions 10
Lattices Find the Lattice 100
Lattices LWE Intro 10
Lattices What's a Lattice? 40
Isogenies Montgomery Curves 30
Isogenies Image Point Arithmetic 30
Diffie-Hellman Working with Fields 10
Diffie-Hellman Generators of Groups 20
Symmetric Ciphers Beatboxer 150
Symmetric Ciphers Dancing Queen 120
Hash Functions MD0 80
Symmetric Ciphers Keyed Permutations 5
Lattices From Private to Public Key LWE 25
Lattices LWE Background 5
Lattices Gaussian Reduction 50
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
Mathematics Successive Powers 60
Mathematics Chinese Remainder Theorem 40
ZKPs ZKP Introduction 5
Elliptic Curves ProSign 3 100
Elliptic Curves Curveball 100
Elliptic Curves Edwards Goes Degenerate 100
Isogenies Introduction to Isogenies 10
Isogenies Meet me in the Claw 120
RSA Inferius Prime 30
General SSH Keys 35
General CERTainly not 30
General Privacy-Enhanced Mail? 25
General Lemur XOR 40
General Modular Inverting 25
General Modular Arithmetic 2 20
General Modular Arithmetic 1 20
General Extended GCD 20
General Greatest Common Divisor 15
RSA Factoring 15
RSA Euler's Totient 20
RSA Null or Never 100
General You either know, XOR you don't 30
General Favourite byte 20
General XOR Properties 15
RSA RSA Backdoor Viability 175
RSA Endless Emails 150
Misc L-Win 120
Misc Bit by Bit 100
Misc Armory 100
Misc RSA vs RNG 150
Mathematics Quadratic Residues 25
RSA Private Keys 20
RSA RSA Decryption 20
RSA Public Keys 15
RSA Modular Exponentiation 10
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
Hash Functions No Difference 175
Lattices Too Many Errors 100
Hash Functions Mixed Up 120
Hash Functions Jack's Birthday Confusion 30
Hash Functions Jack's Birthday Hash 20
Crypto on the Web Token Appreciation 5
CTF Archive Key Backup Service 2 (HKCERT CTF) 0
CTF Archive Sign in Please (HKCERT CTF) 0
CTF Archive Sus (ImaginaryCTF) 0
CTF Archive Oofbleck (Firebird Internal CTF) 0
CTF Archive ed25519 magic (ICC Athens) 0
CTF Archive Hide and seek (ECSC 2023 (Norway)) 0
CTF Archive Calm Down (HKCERT CTF) 0
CTF Archive Sratslla SEA (HKCERT CTF) 0
CTF Archive Cipher Mode Picker (HKCERT CTF) 0
CTF Archive Fischlin's Transformation (CryptoHack) 0
CTF Archive OR Proof (CryptoHack) 0
CTF Archive Tough decisions (ECSC 2023 (Norway)) 0
CTF Archive Key Backup Service 1 (HKCERT CTF) 0
CTF Archive RRSSAA (ECSC 2023 (Norway)) 0
CTF Archive Unevaluated (TETCTF) 0
CTF Archive Tenet: The Plagarism (HKCERT CTF) 0
CTF Archive Unimplemented (TETCTF) 0
CTF Archive A Joke Cipher (HKCERT CTF) 0
CTF Archive Lack of Entropy (Firebird Internal CTF) 0
CTF Archive 1n_jection (Zh3r0 CTF V2) 0
Isogenies The j-invariant 20
Diffie-Hellman Script Kiddie 70
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

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