THIS IS A QUANTUM-SAFE CRYPTOSYSTEM

This is designed over the dihedral group based on the NTRU Round 3 cryptosystem.

The first layer is KEM (Key Encapsulation Mechanism), followed by the implementation of the dihedral group.

KEY FEATURES

1. Quantum-safe design
2. Resistance against Shor's algorithm and other quantum attacks
3. Efficient key generation, encryption, and decryption
4. Secure key exchange using the dihedral group structure
5. Based on lattice-based cryptography principles for added security
6. Constant-time implementation in C to prevent side-channel attacks

IMPLEMENTATION DETAILS

• Uses the NTRU encryption scheme with modifications for dihedral group security
• Implements a hybrid encryption system combining classical and quantum-resistant methods
• Optimized for performance while maintaining high security
• Developed using C with constant-time operations to mitigate timing attacks

USAGE

Installation

1. Clone the repository:

   git clone https://github.com/your-repo/DITRU.git
   cd DITRU

2. Compile the C implementation using Makefile:

   make

Running the Cryptosystem

To generate keys:

./DITRU generate_keys

To encrypt a message:

./DITRU encrypt "Your message here"

To decrypt a message:

./DITRU decrypt "Encrypted message here"

SECURITY CONSIDERATIONS

• The system is designed to withstand quantum computing threats
• Uses a structured noise model to resist attacks
• Parameters are chosen for optimal security-performance tradeoff
• All cryptographic operations are implemented in constant time to prevent timing-based side-channel attacks

FUTURE IMPROVEMENTS

• Implementing post-quantum signature schemes
• Optimizing efficiency for real-world applications
• Extending support for additional cryptographic primitive

LICENSE

This project is licensed under the MIT License.