Signature Size
Short answer: Signature size is the byte length of a digital signature, and post-quantum versions are larger. See how that affects fees and if it shrinks later.
Definition
Signature size refers to the number of bytes required to represent a digital signature. Post-quantum signatures are generally larger than classical signaturesโa trade-off for quantum resistance. Signature size impacts blockchain storage, bandwidth, and transaction throughput.
Technical Explanation
Classical ECDSA signatures are compact at 64-72 bytes. Post-quantum alternatives vary significantly: ML-DSA (Dilithium) signatures range from 2,420-4,627 bytes, while SLH-DSA (SPHINCS+) signatures range from 7,856-49,856 bytes depending on security parameters and optimization choices.
Larger signatures increase block sizes and network bandwidth requirements. Protocol designers balance security levels, signature/verification speed, and size when choosing parameters. Compression techniques and signature aggregation can partially offset size increases.
SynX Relevance
SynX uses SPHINCS+-SHAKE-128s: every transaction signature is exactly 7,856 bytes, paired with a 32-byte public key. That is roughly 109ร an ECDSA signature (~72 bytes)โthe price of quantum resistance, and SynX picked the smallest hash-based signature NIST offers at Level 1 rather than the faster, bulkier "f" variants. The protocol optimizes block structure and network transmission to accommodate larger signatures without sacrificing performance.
Frequently Asked Questions
- Why are post-quantum signatures so large?
- They contain more mathematical proof data to resist quantum attacks on the underlying problems.
- Does signature size affect my transaction fees?
- Not for ordinary sends: SynX sends carry no fee, whatever the signature size.
- Will signature sizes decrease over time?
- Research continues on more compact schemes, but security remains the priority.
Size matters less than security. Secure with SynX
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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