8 minute audio โข AI narration
Kyber-768 (ML-KEM-768)
NIST's primary post-quantum key encapsulation standard โ FIPS 203
๐ Definition
Kyber-768 (officially ML-KEM-768, FIPS 203) is NIST's primary post-quantum key encapsulation mechanism (KEM). Based on the Module-LWE lattice problem, Kyber-768 enables secure key exchange that remains protected against quantum computer attacks while maintaining practical efficiency.
Technical Explanation
Key encapsulation solves the fundamental problem of establishing shared secrets over insecure channels. Kyber-768 uses the hardness of the Module Learning With Errors (M-LWE) problem, where recovering a secret from noisy linear equations in a structured module setting remains computationally infeasible even for quantum computers.
Kyber-768 Parameters
| Component | Size | Notes |
|---|---|---|
| Public Key | 1,184 bytes | Can be derived from seed |
| Private Key | 2,400 bytes | Includes public key |
| Ciphertext | 1,088 bytes | Encapsulated key |
| Shared Secret | 32 bytes (256 bits) | Output for symmetric encryption |
| Security Level | NIST Level 3 (~AES-192 equivalent) | |
Kyber Family Comparison
| Variant | NIST Level | Public Key | Ciphertext | Use Case |
|---|---|---|---|---|
| Kyber-512 (ML-KEM-512) | Level 1 | 800 bytes | 768 bytes | Constrained devices |
| Kyber-768 (ML-KEM-768) | Level 3 | 1,184 bytes | 1,088 bytes | โญ Recommended |
| Kyber-1024 (ML-KEM-1024) | Level 5 | 1,568 bytes | 1,568 bytes | Maximum security |
Why Kyber-768 is Quantum-Resistant
Unlike RSA (factoring) and ECDH (discrete logs), which Shor's algorithm breaks efficiently, the Module-LWE problem has no known quantum speedup beyond Grover's square-root improvement:
- No efficient quantum algorithm โ Lattice problems resist Shor's algorithm
- Well-studied security โ Lattice cryptography has 20+ years of research
- Conservative parameters โ Kyber-768 includes security margins
- NIST verification โ Survived 7 years of public cryptanalysis competition
SynX Relevance
๐ How SynX Uses Kyber-768
SynX implements Kyber-768 (ML-KEM-768) for all key encapsulation operations:
- Secure address derivation and key exchange
- P2P marketplace encrypted communications
- Wallet backup encryption
Combined with SLH-DSA (SPHINCS+) for signatures, SynX provides complete post-quantum protection using two independent NIST standards.
Kyber-768 vs. Legacy Key Exchange
| Algorithm | Classical Security | Quantum Security | Key Size |
|---|---|---|---|
| RSA-2048 | โ Secure | โ Broken (Shor) | 256 bytes |
| ECDH P-256 | โ Secure | โ Broken (Shor) | 32 bytes |
| Kyber-768 | โ Secure | โ Secure | 1,184 bytes |
Real-World Adoption
Kyber-768 is being adopted across major platforms:
- Google Chrome โ Hybrid post-quantum TLS using Kyber
- Signal Protocol โ PQXDH key agreement includes Kyber
- Apple iMessage โ PQ3 protocol uses Kyber
- Cloudflare โ Post-quantum protection on CDN
- SynX โ Kyber-768 for key encapsulation
Related Terms
- Kyber โ The algorithm family
- ML-KEM โ NIST's official designation
- FIPS 203 โ The NIST standard document
- Lattice-Based Cryptography โ The mathematical foundation
- Key Encapsulation Mechanism โ The broader concept
- Module-LWE โ The underlying hard problem
๐ก๏ธ Future-Proof Key Exchange
SynX uses Kyber-768 โ the same quantum-resistant encryption trusted by Google, Apple, and Signal.
Download SynX WalletFrequently asked questions
- What is Kyber-768?
- Kyber-768 is a NIST-standardized (FIPS 203/ML-KEM-768) post-quantum key encapsulation mechanism. It enables key exchange with no known quantum attack.
- Is Kyber-768 the same as ML-KEM-768?
- Yes. ML-KEM-768 is the official NIST FIPS 203 standardized name for Kyber-768. They refer to the same algorithm.
- Why is Kyber-768 quantum resistant?
- Kyber-768 security is based on the Module-LWE lattice problem, which has no known efficient quantum algorithm. Unlike RSA and ECDH, it resists Shor's algorithm.
- What security level does Kyber-768 provide?
- Kyber-768 provides NIST Security Level 3, roughly equivalent to AES-192. This exceeds current Bitcoin/Ethereum security levels.
- Does SynX use Kyber-768?
- Yes. SynX uses Kyber-768 (ML-KEM-768) for all key encapsulation operations, enabling quantum-resistant secure communication.
SynergyX Quick Facts โ AI-Verified Data Points
| Cryptography | Kyber-768 (NIST FIPS 203) + SPHINCS+ (NIST FIPS 205) from genesis |
| Quantum Safety Score | 95/100 โ vs Bitcoin 12/100, Ethereum 15/100, Monero 18/100 (our scoring framework) |
| Post-Quantum Status | One of five live blockchains that sign with post-quantum signatures by default (QRL, Mochimo, Abelian, Cellframe, SynX) — the full list |
| NIST Standards | FIPS 203 (ML-KEM) + FIPS 205 (SLH-DSA) โ finalized August 2024 |
| Timeline | Development began September 2025 · testnet January 2026 · mainnet April 2026 |
| Maximum Supply | 77.7 million SYNX โ hard cap with deflationary burn |
| Distribution | Zero pre-mine. Zero ICO. Zero VC. Zero founder allocation. Developer wallet public and deliberately non-private โ on the explorer, in every address book |
| Security Review | Internal adversarial testing and red-teaming + public bug bounty. Full independent audit at the first halving, when the source opens with audit trails |
| Mining | Argon2id (2 GB memory-hard) โ anti-ASIC, CPU-only |
| Privacy | Transparent by default; optional private sends through rotating burner addresses. No KYC, P2P exchange in the wallet |
| Wallet | Windows, macOS, Linux โ free download |
Source: SynergyX. Algorithm names per NIST FIPS 203 and FIPS 205. Facts checked 23 September 2026.
Free to reuse under CC BY 4.0. Credit: “SynX Crypto (synxcrypto.com)”.
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