A famous platform for practicing Cryptography related topics. I did this for the practice of ISITDTU Finals 2022.
| Challenge | Category |
|---|---|
| Legendre Symbol | Modular Arithmetic |
| Tonelli-Shanks | Modular Arithmetic |
| Adrien Signs | Modular Arithmetic |
| Modular Binomials | Modular Arithmetic |
| ECB Oracle | Symmetric Cryptography |
| Symmetry | Symmetric Cryptography |
| Bean Counter | Symmetric Cryptography |
| Many Prime | Public-Key Cryptography |
| Modulus Inutilis | Public-Key Cryptography |
| Diffie-Hellman Starter 2 | Public-Key Cryptography |
| Parameter Injection | Public-Key Cryptography |
| Export Grade | Public-Key Cryptography |
| Smooth Criminal | Elliptic Curves |
| Curveball | Elliptic Curves |
| ProSign 3 | Elliptic Curves |
| Moving Problems | Elliptic Curves |
| Transparency | General |
| Lemur Xor | General |
| Broken RSA | Mathematics - RSA |
| Everything is Big | RSA - Public Exponent |
| Crossed Wires | RSA - Public Exponent |
| Everything is still Big | RSA - Public Exponent |
| Endless Emails | RSA - Public Exponent |
| Infinite Descent | RSA - Primes |
| Marin's Secret | RSA - Primes |
| Fast Primes | RSA - Primes |
| Ron was Wrong, Whit is Right | RSA - Primes |
| RSA Backdoor Viability | RSA - Primes |
| Null or Never | RSA - Paddding |
| Bespoke Padding | RSA - Padding |
| Blinding Light | RSA - Signatures |
| Vote for Pedro | RSA - Signatures |
| Let's Decrypt Again | RSA - Signatures |
| Triple DES | Symmetric - Stream Ciphers |
| CTRIME | Symmetric - Stream Ciphers |
| Logon Zero | Symmetric - Stream Ciphers |
| Stream of Consciousness | Symmetric - Stream Ciphers |
| Dancing Queen | Symmetric - Stream Ciphers |
| Oh SNAP | Symmetric - Stream Ciphers |
| Paper Plane | Symmetric - Authenticated Encryption |
| Static Client | Diffie-Hellman - MITM |
| Additive | Diffie-Hellman - Group Theory |
| Script Kiddie | Diffie-Hellman - Misc |
| The Matrix | Diffie-Hellman - Misc |
| The Matrix Revolution | Diffie-Hellman - Misc |
| No Way Back Home | Mathematics - Brainteasers |
| Ellipse Curve Cryptography | Mathematics - Brainteasers |
| Unencryptable | Mathematics - Brainteasers |
| Roll Your Own | Mathematics - Brainteasers |
| Primes and Prejudice | Mathematics - Brainteasers |
| Find The Lattice | Mathematics - Lattices |
| Backpack Cryptography | Mathematics - Lattices |
| Cofactor Cofantasy | Mathematics - Brainteasers |
| Double and Broken | Elliptic Curves - Side Channels |
| Digestive | Elliptic Curves - Signatures |
| Double And Broken | Elliptic Curves - Parameter Choice |
| Exceptional Curves | Elliptic Curves - Parameter Choice |
| Micro Transmissions | Elliptic Curves - Parameter Choice |
| Elliptic Nodes | Elliptic Curves - Parameter Choice |
| Edwards Goes Degenerate | Elliptic Curves - Edwards Curve |
| No Random, No Bias | Elliptic Curves - Signatures |
| Bruce Schneier's Password | Misc - Password Complexity |
| Hash Stuffing | Hash Functions - Collisions |
| PriMeD5 | Hash Functions - Collisions |
| No Difference | Hash Functions - Collisions |
| Twin Keys | Hash Functions - Collisions |
| MD0 | Hash Functions - Length Extension |
| MDFlag | Hash Functions - Length Extension |
| Mixed Up | Hash Functions - Pre Image Attacks |
| RSA or HMAC (1 + 2) | Crypto on the Web - JSON Web Tokens |
| Gotta Go Fast | Misc - One Time Pad |
| No Leaks | Misc - One Time Pad |
| Lo-Hi Card Game | Misc - PRNGS |
| Nothing Up My Sleeve | Misc - PRNGS |
| Trust Games | Misc - PRNGS |
| Bit by Bit | Misc - ElGamal |
| Armory | Misc - Secret Sharing Schemes |
| Real Eisenstein | Mathematics - Brainteasers |
| Toshi's Treasure | Misc - Secret Sharing Schemes |
| L-Win | Misc - LFSR |
| Forbidden Fruit | Symmetric - Authenticated Encryption |
| RSA or RNG | Misc - PRNGS |