KOREONE

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Website: https://linktr.ee/koreone

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Submitted Solutions

SIDH Key Exchange 0
Abelian SIDH 0
U-turn (Breizh CTF) 0
Better than Linear 0
What's My Kernel 0
LFSR Destroyer -1
Jeff's LFSR 0
Authenticated Handshake 0
Verilicious (Cyber Apocalypse 2025) 0
Pairing-Based Cryptography 0
DLOG on the Surface 0
L-Win 0
Trust Games 0
Twisted CSIDH Isogenies 1
Secret Exponents 0
Prime Power Isogenies 0
Special Isogenies 0
Composite Isogenies 1
Toshi's Treasure 0
Nothing Up My Sleeve 0
WOTS Up 2 -1
WOTS Up 1
Merkle Trees 0
Saying Hello 0
Twin Keys -1
Double and Broken 0
Beatboxer 0
Oh SNAP 0
Prime and Prejudice 0
Three Isogenies 0
Two Isogenies 1
Montgomery Curves 1
Image Point Arithmetic 0
Where's the Supersingular Curve 0
The j-invariant 0
Gaussian Reduction 0
What's a Lattice? 0
Gram Schmidt 0
MD0 0
Collider 0
Bit by Bit 0
Armory 0
Ellipse Curve Cryptography 0
Real Eisenstein 1
Cofactor Cofantasy 0
Unencryptable 0
Roll your Own 0
No Way Back Home 0
Let's Decrypt Again 0
Digestive 0
Exceptional Curves 0
Elliptic Nodes 0
Vote for Pedro 0
Blinding Light 0
Let's Decrypt 0
Null or Never 0
Bespoke Padding 0
RSA Backdoor Viability -4
Static Client 2 0
Additive 0
Static Client 0
Export-grade 0
Deriving Symmetric Keys 0
Parameter Injection 0
Dancing Queen 0
Ron was Wrong, Whit is Right 0
Endless Emails 0
Everything is Big 0
Everything is Still Big -1
Modulus Inutilis 0
Salty 0
Bean Counter 0
Symmetry 0
Modular Binomials 0
Adrien's Signs 0
Signing Server 0
Fast Primes -2
Marin's Secrets 0
Infinite Descent -1
Crossed Wires 0
Broken RSA 0
Successive Powers 0
Triple DES 0
Lazy CBC 0
Flipping Cookie 0
ECB Oracle 0
ECB CBC WTF 0
Passwords as Keys 0
Modes of Operation Starter 0
JWT Secrets 0
No Way JOSE 0
Efficient Exchange 0
Curves and Logs 0
Scalar Multiplication 0
Point Addition 0
Manyprime 0
Square Eyes 0
Monoprime 0
Inferius Prime 0
Factoring -1
RSA Signatures 0
RSA Decryption 0
Private Keys 0
Euler's Totient 0
Public Keys 0
Bringing It All Together 0
Chinese Remainder Theorem 0
Modular Square Root 0
Legendre Symbol 0
Computing Shared Secrets 0
Computing Public Values 0
Generators of Groups 0
Quadratic Residues 0
Diffusion through Permutation 0
Confusion through Substitution 2
Round Keys 0
Structure of AES 0
SSH Keys 0
Jack's Birthday Hash 1
Lemur XOR 0
CERTainly not 0
Privacy-Enhanced Mail? 0
Modular Inverting 0
Modular Arithmetic 2 0
Modular Arithmetic 1 0
Extended GCD 0
Greatest Common Divisor 0
Encoding Challenge 0
You either know, XOR you don't 0
Favourite byte 0
XOR Properties 0

Solved Challenges

Isogenies SIDH Key Exchange 80
Isogenies Abelian SIDH 90
CTF Archive U-turn (Breizh CTF) 0
Isogenies Better than Linear 85
Isogenies What's My Kernel 70
ZKPs Let's Prove It 120
ZKPs Let's Prove It Again 175
ZKPs Mister Saplins The Prover 125
ZKPs Couples 100
Misc LFSR Destroyer 250
Misc Jeff's LFSR 150
Crypto on the Web Authenticated Handshake 40
CTF Archive Verilicious (Cyber Apocalypse 2025) 0
ZKPs Pairing-Based Cryptography 50
Isogenies DLOG on the Surface 40
Misc L-Win 120
Misc Bruce Schneier's Password 100
Misc Trust Games 150
Isogenies Twisted CSIDH Isogenies 70
Isogenies Secret Exponents 60
Isogenies Prime Power Isogenies 50
Isogenies Special Isogenies 30
ZKPs Fischlin Transform 180
ZKPs Hamiltonicity 1 100
ZKPs Hamiltonicity 2 175
ZKPs OR Proof 75
Isogenies Composite Isogenies 60
Symmetric Ciphers The Good, The Pad, The Ugly 100
Misc RSA vs RNG 150
Misc Toshi's Treasure 150
Misc Nothing Up My Sleeve 150
Misc Lo-Hi Card Game 120
Hash Functions WOTS Up 2 90
Hash Functions WOTS Up 75
Hash Functions Merkle Trees 25
Crypto on the Web Decrypting TLS 1.3 35
Crypto on the Web Decrypting TLS 1.2 30
Crypto on the Web Saying Hello 20
Lattices From Private to Public Key LWE 25
Lattices Backpack Cryptography 120
ZKPs Too Honest 50
ZKPs Non-Interactive 35
ZKPs Honest Verifier Zero Knowledge 30
ZKPs Special Soundness 25
ZKPs Proofs of Knowledge 20
Lattices Bounded Noise 50
Lattices Missing Modulus 80
Lattices Noise Cheap 90
Lattices Too Many Errors 100
Lattices Nativity 60
Lattices LWE High Bits Message 15
Lattices LWE Low Bits Message 20
Lattices Noise Free 40
Crypto on the Web TLS Handshake 15
Crypto on the Web Sharks on the Wire 10
Crypto on the Web Secure Protocols 5
Lattices Find the Lattice 100
Misc No Leaks 100
Crypto on the Web Megalomaniac 1 100
Crypto on the Web RSA or HMAC? Part 2 100
Hash Functions Mixed Up 120
Crypto on the Web RSA or HMAC? 35
Elliptic Curves Montgomery's Ladder 40
Diffie-Hellman The Matrix Revolutions 125
Diffie-Hellman The Matrix Reloaded 100
Hash Functions Invariant 250
Hash Functions MDFlag 125
Hash Functions No Difference 175
Hash Functions Twin Keys 100
Hash Functions PriMeD5 100
Hash Functions Hash Stuffing 50
Elliptic Curves Edwards Goes Degenerate 100
Elliptic Curves Real Curve Crypto 200
Elliptic Curves No Random, No Bias 120
Elliptic Curves Double and Broken 50
Elliptic Curves ProSign 3 100
Elliptic Curves Moving Problems 150
Elliptic Curves Micro Transmissions 120
Diffie-Hellman The Matrix 75
Symmetric Ciphers Beatboxer 150
Symmetric Ciphers Oh SNAP 120
Mathematics Prime and Prejudice 200
Symmetric Ciphers Forbidden Fruit 150
Isogenies Three Isogenies 35
Isogenies Two Isogenies 30
Isogenies Montgomery Curves 30
Isogenies Image Point Arithmetic 30
Isogenies Where's the Supersingular Curve 25
Isogenies The j-invariant 20
Lattices LWE Intro 10
Lattices LWE Background 5
Lattices Gaussian Reduction 50
Lattices What's a Lattice? 40
Lattices Gram Schmidt 30
Lattices Size and Basis 15
Lattices Vectors 10
CTF Archive Twist and shout (ECSC 2023 (Norway)) 0
Hash Functions MD0 80
Crypto on the Web JSON in JSON 40
Hash Functions Collider 50
Misc Gotta Go Fast 40
Misc Bit by Bit 100
Misc Armory 100
Diffie-Hellman Script Kiddie 70
Symmetric Ciphers Pad Thai 80
Mathematics Ellipse Curve Cryptography 125
Mathematics Real Eisenstein 150
Mathematics Cofactor Cofantasy 150
Mathematics Unencryptable 125
Mathematics Roll your Own 125
Mathematics No Way Back Home 100
RSA Let's Decrypt Again 175
Elliptic Curves Curveball 100
Elliptic Curves Digestive 60
Elliptic Curves Elliptic Nodes 150
Elliptic Curves Smooth Criminal 60
Elliptic Curves Exceptional Curves 100
Symmetric Ciphers Paper Plane 120
RSA Vote for Pedro 150
RSA Blinding Light 120
RSA Let's Decrypt 80
RSA Null or Never 100
RSA Bespoke Padding 100
RSA RSA Backdoor Viability 175
Diffie-Hellman Static Client 2 120
Diffie-Hellman Additive 70
Diffie-Hellman Static Client 100
Diffie-Hellman Export-grade 100
Diffie-Hellman Deriving Symmetric Keys 40
Diffie-Hellman Parameter Injection 60
Symmetric Ciphers Dancing Queen 120
ZKPs ZKP Introduction 5
RSA Ron was Wrong, Whit is Right 90
RSA Endless Emails 150
RSA Everything is Big 70
RSA Everything is Still Big 100
RSA Modulus Inutilis 50
RSA Salty 20
Symmetric Ciphers Logon Zero 80
Symmetric Ciphers Stream of Consciousness 80
Symmetric Ciphers CTRIME 70
Symmetric Ciphers Bean Counter 60
Symmetric Ciphers Symmetry 50
Mathematics Modular Binomials 80
Mathematics Adrien's Signs 80
RSA Signing Server 60
RSA Fast Primes 75
RSA Marin's Secrets 50
RSA Infinite Descent 50
RSA Crossed Wires 100
Mathematics Broken RSA 100
Mathematics Successive Powers 60
Symmetric Ciphers Triple DES 60
Symmetric Ciphers Lazy CBC 60
Symmetric Ciphers Flipping Cookie 60
Symmetric Ciphers ECB Oracle 60
Symmetric Ciphers ECB CBC WTF 55
Symmetric Ciphers Passwords as Keys 50
Symmetric Ciphers Modes of Operation Starter 15
Crypto on the Web JWT Secrets 25
Crypto on the Web No Way JOSE 20
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
RSA Manyprime 40
RSA Square Eyes 35
RSA Monoprime 30
RSA Inferius Prime 30
RSA Factoring 15
Crypto on the Web JWT Sessions 10
Crypto on the Web Token Appreciation 5
RSA RSA Signatures 25
RSA RSA Decryption 20
RSA Private Keys 20
RSA Euler's Totient 20
RSA Public Keys 15
Symmetric Ciphers Bringing It All Together 50
Mathematics Chinese Remainder Theorem 40
Mathematics Modular Square Root 35
Mathematics Legendre Symbol 35
Isogenies Introduction to Isogenies 10
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 Modular Exponentiation 10
Mathematics Quadratic Residues 25
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
General Transparency 50
General SSH Keys 35
Hash Functions Jack's Birthday Hash 20
General Lemur XOR 40
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 You either know, XOR you don't 30
General Encoding Challenge 40
General Favourite byte 20
Hash Functions Jack's Birthday Confusion 30
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

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