What is Zixt?

Zixt Chat: Quantum Secure Collaboration

Zixt Chat is a cutting-edge secure messaging application designed for privacy-conscious users and organizations. Leveraging advanced cryptographic technologies, Zixt ensures unparalleled security by storing messages on a private blockchain ledger, protected by Kyber 1024 post-quantum encryption. This robust encryption safeguards communications against future quantum computing threats, ensuring long-term data confidentiality.

The private blockchain operates with a distributed hash table (DHT) architecture, allowing multiple nodes to participate seamlessly. Each transaction on the ledger is authenticated using SPHINCS+ hash-based signatures, providing quantum-resistant integrity and authenticity for all messages.

Zixt Chat is ideal for enterprises, government agencies, hobbyists or individuals seeking a secure, future-proof collaboration platform. With its blend of quantum-resistant cryptography, blockchain technology, and user-friendly design, Zixt Chat redefines secure communication for the digital age.

Blockchain?

Zixt employs a custom blockchain to store critical application data, such as user identities (cryptographic pseudonyms) and message metadata, ensuring immutability and transparency. The blockchain is a distributed ledger where each block contains a set of transactions (e.g., user registrations, message sends, or authentication events) and is cryptographically linked to the previous block.

Block Structure: Each block includes:

• A unique block ID.
• A timestamp.
• A list of transactions (e.g., user registration events or message metadata).
• A reference to the previous block’s hash, ensuring chain integrity.
• A SPHINCS+ signature for post-quantum security, verifying the block’s authenticity.

Transaction Types:

• User Registration: Stores a user’s cryptographic pseudonym and public key, signed with SPHINCS+ to ensure quantum-resistant authentication.
• Message Metadata: Records details like sender, recipient, timestamp, and a hash of the message content (actual message content is stored off-chain for efficiency).
• Authentication Events: Logs login attempts or key updates, ensuring traceability.