Kyber-768 (officially ML-KEM-768) is a NIST-approved post-quantum key encapsulation mechanism (KEM) that uses lattice-based cryptography to securely exchange encryption keys. Unlike RSA and ECDH which are vulnerable to quantum attacks, Kyber remains secure against both classical and quantum computers. SynX uses Kyber-768 for all quantum-resistant key exchanges.
🔐 Quick Facts About Kyber-768
- Official Name: ML-KEM-768 (FIPS 203)
- Security Level: 192-bit (NIST Level 3)
- Based On: Module Learning With Errors (MLWE)
- Standardized: August 2024 by NIST
- Used By: SynX, Signal, Cloudflare, Google
How Kyber-768 Works
Kyber is a key encapsulation mechanism (KEM), which means it securely generates and transmits shared secrets between two parties. Here's the simplified process:
- Key Generation – Alice generates a public/private key pair using lattice mathematics
- Encapsulation – Bob uses Alice's public key to generate a shared secret and ciphertext
- Decapsulation – Alice uses her private key to recover the shared secret from the ciphertext
- Secure Communication – Both parties now share a secret key for symmetric encryption
The MLWE Problem
Kyber's security is based on the Module Learning With Errors (MLWE) problem. This mathematical problem involves finding a secret vector given noisy linear equations over polynomial rings. Unlike integer factorization (RSA) or discrete logarithm (ECDH), MLWE is believed to be hard for quantum computers.
Kyber-768 Technical Specifications
| Parameter | Kyber-768 Value |
|---|---|
| Security Level | NIST Level 3 (192-bit) |
| Public Key Size | 1,184 bytes |
| Secret Key Size | 2,400 bytes |
| Ciphertext Size | 1,088 bytes |
| Shared Secret Size | 32 bytes |
| Module Rank (k) | 3 |
| Polynomial Degree (n) | 256 |
Why Kyber-768 (Not 512 or 1024)?
NIST standardized three Kyber variants:
- Kyber-512: 128-bit security (Level 1) – Smallest, fastest
- Kyber-768: 192-bit security (Level 3) – Balanced security/performance
- Kyber-1024: 256-bit security (Level 5) – Maximum security, larger keys
SynX uses Kyber-768 for the optimal balance of security margin and transaction efficiency. 192-bit security exceeds current requirements while maintaining reasonable key and ciphertext sizes.
Kyber in SynX Transactions
When you send a SynX transaction, Kyber-768 is used to:
- Securely derive shared secrets for transaction encryption
- Protect address key exchanges from quantum eavesdroppers
- Enable quantum-resistant stealth addressing
Combined with SPHINCS+ signatures, SynX provides complete post-quantum security for all transactions.
Frequently Asked Questions
What is Kyber-768?
Kyber-768 (officially ML-KEM-768) is a NIST-approved post-quantum key encapsulation mechanism. It uses lattice-based cryptography to securely exchange encryption keys, remaining secure against both classical and quantum computer attacks.
Is Kyber-768 NIST approved?
Yes. NIST standardized Kyber as ML-KEM (Module-Lattice-Based Key-Encapsulation Mechanism) in FIPS 203 in August 2024. It is one of the first post-quantum cryptographic standards.
How does Kyber-768 resist quantum attacks?
Kyber is based on the Module Learning With Errors (MLWE) problem, which is believed to be hard for both classical and quantum computers. Unlike RSA and ECDSA, there is no known quantum algorithm that can efficiently solve MLWE.
Which cryptocurrencies use Kyber-768?
SynX is among the first cryptocurrencies to implement Kyber-768 for quantum-resistant key exchange in all transactions, combined with SPHINCS+ for digital signatures.
Experience Kyber-768 Protection
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