Digital Signature Algorithm (DSA)
Definition
A Digital Signature Algorithm is a cryptographic scheme that provides authentication, integrity, and non-repudiation for digital messages. The signer uses a private key to create a signature that anyone can verify using the corresponding public key. Post-quantum DSAs include Dilithium, SPHINCS+, and FALCON.
Technical Explanation
Signature operations: KeyGen creates a signing key pair; Sign takes the private key and message to produce a signature; Verify takes the public key, message, and signature to confirm validity. Security ensures only the private key holder can create valid signatures.
Classical DSAs (RSA, ECDSA) rely on factoring or discrete logarithm problems—vulnerable to Shor's algorithm. Post-quantum DSAs use different mathematical foundations: lattices (Dilithium, FALCON) or hash functions (SPHINCS+). These resist all known quantum attacks.
SynX Relevance
Every SynX transaction requires a digital signature proving authorization. SynX implements SPHINCS+ (SLH-DSA) for maximum security conservatism. Each transaction you make carries a quantum-resistant signature that validates your ownership and prevents unauthorized fund transfers.
Frequently Asked Questions
- Why are signatures essential for cryptocurrency?
- Signatures prove ownership—without valid signatures, anyone could spend anyone's funds.
- Can signatures be forged?
- With secure algorithms and protected private keys, forging signatures is computationally infeasible.
- What happens to ECDSA signatures on quantum computers?
- Shor's algorithm enables forgery, making ECDSA-based cryptocurrencies vulnerable.
Unforgeable quantum-resistant signatures. Secure transactions with SynX